jquery-mobile/js/jquery.mobile.navigation.js

/*
* core utilities for auto ajax navigation, base tag mgmt,
*/

( function( $, undefined ) {

	//define vars for interal use
	var $window = $( window ),
		$html = $( 'html' ),
		$head = $( 'head' ),

		//url path helpers for use in relative url management
		path = {

			// This scary looking regular expression parses an absolute URL or its relative
			// variants (protocol, site, document, query, and hash), into the various
			// components (protocol, host, path, query, fragment, etc that make up the
			// URL as well as some other commonly used sub-parts. When used with RegExp.exec()
			// or String.match, it parses the URL into a results array that looks like this:
			//
			//     [0]: http://jblas:password@mycompany.com:8080/mail/inbox?msg=1234&type=unread#msg-content
			//     [1]: http://jblas:password@mycompany.com:8080/mail/inbox?msg=1234&type=unread
			//     [2]: http://jblas:password@mycompany.com:8080/mail/inbox
			//     [3]: http://jblas:password@mycompany.com:8080
			//     [4]: http:
			//     [5]: //
			//     [6]: jblas:password@mycompany.com:8080
			//     [7]: jblas:password
			//     [8]: jblas
			//     [9]: password
			//    [10]: mycompany.com:8080
			//    [11]: mycompany.com
			//    [12]: 8080
			//    [13]: /mail/inbox
			//    [14]: /mail/
			//    [15]: inbox
			//    [16]: ?msg=1234&type=unread
			//    [17]: #msg-content
			//
			urlParseRE: /^(((([^:\/#\?]+:)?(?:(\/\/)((?:(([^:@\/#\?]+)(?:\:([^:@\/#\?]+))?)@)?(([^:\/#\?\]\[]+|\[[^\/\]@#?]+\])(?:\:([0-9]+))?))?)?)?((\/?(?:[^\/\?#]+\/+)*)([^\?#]*)))?(\?[^#]+)?)(#.*)?/,

			//Parse a URL into a structure that allows easy access to
			//all of the URL components by name.
			parseUrl: function( url ) {
				// If we're passed an object, we'll assume that it is
				// a parsed url object and just return it back to the caller.
				if ( $.type( url ) === "object" ) {
					return url;
				}

				var matches = path.urlParseRE.exec( url || "" ) || [];

					// Create an object that allows the caller to access the sub-matches
					// by name. Note that IE returns an empty string instead of undefined,
					// like all other browsers do, so we normalize everything so its consistent
					// no matter what browser we're running on.
					return {
						href:         matches[  0 ] || "",
						hrefNoHash:   matches[  1 ] || "",
						hrefNoSearch: matches[  2 ] || "",
						domain:       matches[  3 ] || "",
						protocol:     matches[  4 ] || "",
						doubleSlash:  matches[  5 ] || "",
						authority:    matches[  6 ] || "",
						username:     matches[  8 ] || "",
						password:     matches[  9 ] || "",
						host:         matches[ 10 ] || "",
						hostname:     matches[ 11 ] || "",
						port:         matches[ 12 ] || "",
						pathname:     matches[ 13 ] || "",
						directory:    matches[ 14 ] || "",
						filename:     matches[ 15 ] || "",
						search:       matches[ 16 ] || "",
						hash:         matches[ 17 ] || ""
					};
			},

			//Turn relPath into an asbolute path. absPath is
			//an optional absolute path which describes what
			//relPath is relative to.
			makePathAbsolute: function( relPath, absPath ) {
				if ( relPath && relPath.charAt( 0 ) === "/" ) {
					return relPath;
				}

				relPath = relPath || "";
				absPath = absPath ? absPath.replace( /^\/|(\/[^\/]*|[^\/]+)$/g, "" ) : "";

				var absStack = absPath ? absPath.split( "/" ) : [],
					relStack = relPath.split( "/" );
				for ( var i = 0; i < relStack.length; i++ ) {
					var d = relStack[ i ];
					switch ( d ) {
						case ".":
							break;
						case "..":
							if ( absStack.length ) {
								absStack.pop();
							}
							break;
						default:
							absStack.push( d );
							break;
					}
				}
				return "/" + absStack.join( "/" );
			},

			//Returns true if both urls have the same domain.
			isSameDomain: function( absUrl1, absUrl2 ) {
				return path.parseUrl( absUrl1 ).domain === path.parseUrl( absUrl2 ).domain;
			},

			//Returns true for any relative variant.
			isRelativeUrl: function( url ) {
				// All relative Url variants have one thing in common, no protocol.
				return path.parseUrl( url ).protocol === "";
			},

			//Returns true for an absolute url.
			isAbsoluteUrl: function( url ) {
				return path.parseUrl( url ).protocol !== "";
			},

			//Turn the specified realtive URL into an absolute one. This function
			//can handle all relative variants (protocol, site, document, query, fragment).
			makeUrlAbsolute: function( relUrl, absUrl ) {
				if ( !path.isRelativeUrl( relUrl ) ) {
					return relUrl;
				}

				var relObj = path.parseUrl( relUrl ),
					absObj = path.parseUrl( absUrl ),
					protocol = relObj.protocol || absObj.protocol,
					doubleSlash = relObj.protocol ? relObj.doubleSlash : ( relObj.doubleSlash || absObj.doubleSlash ),
					authority = relObj.authority || absObj.authority,
					hasPath = relObj.pathname !== "",
					pathname = path.makePathAbsolute( relObj.pathname || absObj.filename, absObj.pathname ),
					search = relObj.search || ( !hasPath && absObj.search ) || "",
					hash = relObj.hash;

				return protocol + doubleSlash + authority + pathname + search + hash;
			},

			//Add search (aka query) params to the specified url.
			addSearchParams: function( url, params ) {
				var u = path.parseUrl( url ),
					p = ( typeof params === "object" ) ? $.param( params ) : params,
					s = u.search || "?";
				return u.hrefNoSearch + s + ( s.charAt( s.length - 1 ) !== "?" ? "&" : "" ) + p + ( u.hash || "" );
			},

			convertUrlToDataUrl: function( absUrl ) {
				var u = path.parseUrl( absUrl );
				if ( path.isEmbeddedPage( u ) ) {
				    // For embedded pages, remove the dialog hash key as in getFilePath(),
				    // otherwise the Data Url won't match the id of the embedded Page.
					return u.hash.split( dialogHashKey )[0].replace( /^#/, "" );
				} else if ( path.isSameDomain( u, documentBase ) ) {
					return u.hrefNoHash.replace( documentBase.domain, "" );
				}
				return absUrl;
			},

			//get path from current hash, or from a file path
			get: function( newPath ) {
				if( newPath === undefined ) {
					newPath = location.hash;
				}
				return path.stripHash( newPath ).replace( /[^\/]*\.[^\/*]+$/, '' );
			},

			//return the substring of a filepath before the sub-page key, for making a server request
			getFilePath: function( path ) {
				var splitkey = '&' + $.mobile.subPageUrlKey;
				return path && path.split( splitkey )[0].split( dialogHashKey )[0];
			},

			//set location hash to path
			set: function( path ) {
				location.hash = path;
			},

			//test if a given url (string) is a path
			//NOTE might be exceptionally naive
			isPath: function( url ) {
				return ( /\// ).test( url );
			},

			//return a url path with the window's location protocol/hostname/pathname removed
			clean: function( url ) {
				return url.replace( documentBase.domain, "" );
			},

			//just return the url without an initial #
			stripHash: function( url ) {
				return url.replace( /^#/, "" );
			},

			//remove the preceding hash, any query params, and dialog notations
			cleanHash: function( hash ) {
				return path.stripHash( hash.replace( /\?.*$/, "" ).replace( dialogHashKey, "" ) );
			},

			//check whether a url is referencing the same domain, or an external domain or different protocol
			//could be mailto, etc
			isExternal: function( url ) {
				var u = path.parseUrl( url );
				return u.protocol && u.domain !== documentUrl.domain ? true : false;
			},

			hasProtocol: function( url ) {
				return ( /^(:?\w+:)/ ).test( url );
			},

			//check if the specified url refers to the first page in the main application document.
			isFirstPageUrl: function( url ) {
				// We only deal with absolute paths.
				var u = path.parseUrl( path.makeUrlAbsolute( url, documentBase ) ),

					// Does the url have the same path as the document?
					samePath = u.hrefNoHash === documentUrl.hrefNoHash || ( documentBaseDiffers && u.hrefNoHash === documentBase.hrefNoHash ),

					// Get the first page element.
					fp = $.mobile.firstPage,

					// Get the id of the first page element if it has one.
					fpId = fp && fp[0] ? fp[0].id : undefined;

					// The url refers to the first page if the path matches the document and
					// it either has no hash value, or the hash is exactly equal to the id of the
					// first page element.
					return samePath && ( !u.hash || u.hash === "#" || ( fpId && u.hash.replace( /^#/, "" ) === fpId ) );
			},

			isEmbeddedPage: function( url ) {
				var u = path.parseUrl( url );

				//if the path is absolute, then we need to compare the url against
				//both the documentUrl and the documentBase. The main reason for this
				//is that links embedded within external documents will refer to the
				//application document, whereas links embedded within the application
				//document will be resolved against the document base.
				if ( u.protocol !== "" ) {
					return ( u.hash && ( u.hrefNoHash === documentUrl.hrefNoHash || ( documentBaseDiffers && u.hrefNoHash === documentBase.hrefNoHash ) ) );
				}
				return (/^#/).test( u.href );
			}
		},

		//will be defined when a link is clicked and given an active class
		$activeClickedLink = null,

		//urlHistory is purely here to make guesses at whether the back or forward button was clicked
		//and provide an appropriate transition
		urlHistory = {
			// Array of pages that are visited during a single page load.
			// Each has a url and optional transition, title, and pageUrl (which represents the file path, in cases where URL is obscured, such as dialogs)
			stack: [],

			//maintain an index number for the active page in the stack
			activeIndex: 0,

			//get active
			getActive: function() {
				return urlHistory.stack[ urlHistory.activeIndex ];
			},

			getPrev: function() {
				return urlHistory.stack[ urlHistory.activeIndex - 1 ];
			},

			getNext: function() {
				return urlHistory.stack[ urlHistory.activeIndex + 1 ];
			},

			// addNew is used whenever a new page is added
			addNew: function( url, transition, title, pageUrl, role ) {
				//if there's forward history, wipe it
				if( urlHistory.getNext() ) {
					urlHistory.clearForward();
				}

				urlHistory.stack.push( {url : url, transition: transition, title: title, pageUrl: pageUrl, role: role } );

				urlHistory.activeIndex = urlHistory.stack.length - 1;
			},

			//wipe urls ahead of active index
			clearForward: function() {
				urlHistory.stack = urlHistory.stack.slice( 0, urlHistory.activeIndex + 1 );
			},

			directHashChange: function( opts ) {
				var back , forward, newActiveIndex, prev = this.getActive();

				// check if url isp in history and if it's ahead or behind current page
				$.each( urlHistory.stack, function( i, historyEntry ) {

					//if the url is in the stack, it's a forward or a back
					if( opts.currentUrl === historyEntry.url ) {
						//define back and forward by whether url is older or newer than current page
						back = i < urlHistory.activeIndex;
						forward = !back;
						newActiveIndex = i;
					}
				});

				// save new page index, null check to prevent falsey 0 result
				this.activeIndex = newActiveIndex !== undefined ? newActiveIndex : this.activeIndex;

				if( back ) {
					( opts.either || opts.isBack )( true );
				} else if( forward ) {
					( opts.either || opts.isForward )( false );
				}
			},

			//disable hashchange event listener internally to ignore one change
			//toggled internally when location.hash is updated to match the url of a successful page load
			ignoreNextHashChange: false
		},

		//define first selector to receive focus when a page is shown
		focusable = "[tabindex],a,button:visible,select:visible,input",

		//queue to hold simultanious page transitions
		pageTransitionQueue = [],

		//indicates whether or not page is in process of transitioning
		isPageTransitioning = false,

		//nonsense hash change key for dialogs, so they create a history entry
		dialogHashKey = "&ui-state=dialog",

		//existing base tag?
		$base = $head.children( "base" ),

		//tuck away the original document URL minus any fragment.
		documentUrl = path.parseUrl( location.href ),

		//if the document has an embedded base tag, documentBase is set to its
		//initial value. If a base tag does not exist, then we default to the documentUrl.
		documentBase = $base.length ? path.parseUrl( path.makeUrlAbsolute( $base.attr( "href" ), documentUrl.href ) ) : documentUrl,

		//cache the comparison once.
		documentBaseDiffers = ( documentUrl.hrefNoHash !== documentBase.hrefNoHash );

		//base element management, defined depending on dynamic base tag support
		var base = $.support.dynamicBaseTag ? {

			//define base element, for use in routing asset urls that are referenced in Ajax-requested markup
			element: ( $base.length ? $base : $( "<base>", { href: documentBase.hrefNoHash } ).prependTo( $head ) ),

			//set the generated BASE element's href attribute to a new page's base path
			set: function( href ) {
				base.element.attr( "href", path.makeUrlAbsolute( href, documentBase ) );
			},

			//set the generated BASE element's href attribute to a new page's base path
			reset: function() {
				base.element.attr( "href", documentBase.hrefNoHash );
			}

		} : undefined;

/*
	internal utility functions
--------------------------------------*/


	//direct focus to the page title, or otherwise first focusable element
	function reFocus( page ) {
		var pageTitle = page.find( ".ui-title:eq(0)" );

		if( pageTitle.length ) {
			pageTitle.focus();
		}
		else{
			page.focus();
		}
	}

	//remove active classes after page transition or error
	function removeActiveLinkClass( forceRemoval ) {
		if( !!$activeClickedLink && ( !$activeClickedLink.closest( '.ui-page-active' ).length || forceRemoval ) ) {
			$activeClickedLink.removeClass( $.mobile.activeBtnClass );
		}
		$activeClickedLink = null;
	}

	function releasePageTransitionLock() {
		isPageTransitioning = false;
		if( pageTransitionQueue.length > 0 ) {
			$.mobile.changePage.apply( null, pageTransitionQueue.pop() );
		}
	}

	// Save the last scroll distance per page, before it is hidden
	var setLastScrollEnabled = true,
		firstScrollElem, getScrollElem, setLastScroll, delayedSetLastScroll;

	getScrollElem = function() {
		var scrollElem = $window, activePage,
			touchOverflow = $.support.touchOverflow && $.mobile.touchOverflowEnabled;

		if( touchOverflow ){
			activePage = $( ".ui-page-active" );
			scrollElem = activePage.is( ".ui-native-fixed" ) ? activePage.find( ".ui-content" ) : activePage;
		}

		return scrollElem;
	};

	setLastScroll = function( scrollElem ) {
		// this barrier prevents setting the scroll value based on the browser
		// scrolling the window based on a hashchange
		if( !setLastScrollEnabled ) {
			return;
		}

		var active = $.mobile.urlHistory.getActive();

		if( active ) {
			var lastScroll = scrollElem && scrollElem.scrollTop();

			// Set active page's lastScroll prop.
			// If the location we're scrolling to is less than minScrollBack, let it go.
			active.lastScroll = lastScroll < $.mobile.minScrollBack ? $.mobile.defaultHomeScroll : lastScroll;
		}
	};

	// bind to scrollstop to gather scroll position. The delay allows for the hashchange
	// event to fire and disable scroll recording in the case where the browser scrolls
	// to the hash targets location (sometimes the top of the page). once pagechange fires
	// getLastScroll is again permitted to operate
	delayedSetLastScroll = function() {
		setTimeout( setLastScroll, 100, $(this) );
	};

	// disable an scroll setting when a hashchange has been fired, this only works
	// because the recording of the scroll position is delayed for 100ms after
	// the browser might have changed the position because of the hashchange
	$window.bind( $.support.pushState ? "popstate" : "hashchange", function() {
	 	setLastScrollEnabled = false;
	});

	// handle initial hashchange from chrome :(
	$window.one( $.support.pushState ? "popstate" : "hashchange", function() {
		setLastScrollEnabled = true;
	});

	// wait until the mobile page container has been determined to bind to pagechange
	$window.one( "pagecontainercreate", function(){
		// once the page has changed, re-enable the scroll recording
		$.mobile.pageContainer.bind( "pagechange", function() {
			var scrollElem = getScrollElem();

	 		setLastScrollEnabled = true;

			// remove any binding that previously existed on the get scroll
			// which may or may not be different than the scroll element determined for
			// this page previously
			scrollElem.unbind( "scrollstop", delayedSetLastScroll );

			// determine and bind to the current scoll element which may be the window
			// or in the case of touch overflow the element with touch overflow
			scrollElem.bind( "scrollstop", delayedSetLastScroll );
		});
	});

	// bind to scrollstop for the first page as "pagechange" won't be fired in that case
	getScrollElem().bind( "scrollstop", delayedSetLastScroll );

	// Make the iOS clock quick-scroll work again if we're using native overflow scrolling
	/*
	if( $.support.touchOverflow ){
		if( $.mobile.touchOverflowEnabled ){
			$( window ).bind( "scrollstop", function(){
				if( $( this ).scrollTop() === 0 ){
					$.mobile.activePage.scrollTop( 0 );
				}
			});
		}
	}
	*/

	//function for transitioning between two existing pages
	function transitionPages( toPage, fromPage, transition, reverse ) {

		//get current scroll distance
		var active	= $.mobile.urlHistory.getActive(),
			touchOverflow = $.support.touchOverflow && $.mobile.touchOverflowEnabled,
			toScroll = active.lastScroll || ( touchOverflow ? 0 : $.mobile.defaultHomeScroll ),
			screenHeight = getScreenHeight();

		// Scroll to top, hide addr bar
		window.scrollTo( 0, $.mobile.defaultHomeScroll );

		if( fromPage ) {
			//trigger before show/hide events
			fromPage.data( "page" )._trigger( "beforehide", null, { nextPage: toPage } );
		}

		if( !touchOverflow){
			toPage.height( screenHeight + toScroll );
		}

		toPage.data( "page" )._trigger( "beforeshow", null, { prevPage: fromPage || $( "" ) } );

		//clear page loader
		$.mobile.hidePageLoadingMsg();

		if( touchOverflow && toScroll ){

			toPage.addClass( "ui-mobile-pre-transition" );
			// Send focus to page as it is now display: block
			reFocus( toPage );

			//set page's scrollTop to remembered distance
			if( toPage.is( ".ui-native-fixed" ) ){
				toPage.find( ".ui-content" ).scrollTop( toScroll );
			}
			else{
				toPage.scrollTop( toScroll );
			}
		}

		//find the transition handler for the specified transition. If there
		//isn't one in our transitionHandlers dictionary, use the default one.
		//call the handler immediately to kick-off the transition.
		var th = $.mobile.transitionHandlers[transition || "none"] || $.mobile.defaultTransitionHandler,
			promise = th( transition, reverse, toPage, fromPage );

		promise.done(function() {
			//reset toPage height back
			if( !touchOverflow ){
				toPage.height( "" );
			}

			// Jump to top or prev scroll, sometimes on iOS the page has not rendered yet.
			if( !touchOverflow ){
				$.mobile.silentScroll( toScroll );
			}

			//trigger show/hide events
			if( fromPage ) {
				if( !touchOverflow ){
					fromPage.height( "" );
				}

				fromPage.data( "page" )._trigger( "hide", null, { nextPage: toPage } );
			}

			//trigger pageshow, define prevPage as either fromPage or empty jQuery obj
			toPage.data( "page" )._trigger( "show", null, { prevPage: fromPage || $( "" ) } );
		});

		return promise;
	}

	//simply set the active page's minimum height to screen height, depending on orientation
	function getScreenHeight(){
		var orientation 	= $.event.special.orientationchange.orientation(),
			port			= orientation === "portrait",
			winMin			= port ? 480 : 320,
			screenHeight	= port ? screen.availHeight : screen.availWidth,
			winHeight		= Math.max( winMin, $( window ).height() ),
			pageMin			= Math.min( screenHeight, winHeight );

		return pageMin;
	}

	$.mobile.getScreenHeight = getScreenHeight;

	//simply set the active page's minimum height to screen height, depending on orientation
	function resetActivePageHeight(){
		// Don't apply this height in touch overflow enabled mode
		if( $.support.touchOverflow && $.mobile.touchOverflowEnabled ){
			return;
		}
		$( "." + $.mobile.activePageClass ).css( "min-height", getScreenHeight() );
	}

	//shared page enhancements
	function enhancePage( $page, role ) {
		// If a role was specified, make sure the data-role attribute
		// on the page element is in sync.
		if( role ) {
			$page.attr( "data-" + $.mobile.ns + "role", role );
		}

		//run page plugin
		$page.page();
	}

/* exposed $.mobile methods	 */

	//animation complete callback
	$.fn.animationComplete = function( callback ) {
		if( $.support.cssTransitions ) {
			return $( this ).one( 'webkitAnimationEnd', callback );
		}
		else{
			// defer execution for consistency between webkit/non webkit
			setTimeout( callback, 0 );
			return $( this );
		}
	};

	//expose path object on $.mobile
	$.mobile.path = path;

	//expose base object on $.mobile
	$.mobile.base = base;

	//history stack
	$.mobile.urlHistory = urlHistory;

	$.mobile.dialogHashKey = dialogHashKey;

	//default non-animation transition handler
	$.mobile.noneTransitionHandler = function( name, reverse, $toPage, $fromPage ) {
		if ( $fromPage ) {
			$fromPage.removeClass( $.mobile.activePageClass );
		}
		$toPage.addClass( $.mobile.activePageClass );

		return $.Deferred().resolve( name, reverse, $toPage, $fromPage ).promise();
	};

	//default handler for unknown transitions
	$.mobile.defaultTransitionHandler = $.mobile.noneTransitionHandler;

	//transition handler dictionary for 3rd party transitions
	$.mobile.transitionHandlers = {
		none: $.mobile.defaultTransitionHandler
	};

	//enable cross-domain page support
	$.mobile.allowCrossDomainPages = false;

	//return the original document url
	$.mobile.getDocumentUrl = function(asParsedObject) {
		return asParsedObject ? $.extend( {}, documentUrl ) : documentUrl.href;
	};

	//return the original document base url
	$.mobile.getDocumentBase = function(asParsedObject) {
		return asParsedObject ? $.extend( {}, documentBase ) : documentBase.href;
	};

	$.mobile._bindPageRemove = function() {
		var page = $(this);

		// when dom caching is not enabled or the page is embedded bind to remove the page on hide
		if( !page.data("page").options.domCache
				&& page.is(":jqmData(external-page='true')") ) {

			page.bind( 'pagehide.remove', function() {
				var $this = $( this ),
					prEvent = new $.Event( "pageremove" );

				$this.trigger( prEvent );

				if( !prEvent.isDefaultPrevented() ){
					$this.removeWithDependents();
				}
			});
		}
	};

	// Load a page into the DOM.
	$.mobile.loadPage = function( url, options ) {
		// This function uses deferred notifications to let callers
		// know when the page is done loading, or if an error has occurred.
		var deferred = $.Deferred(),

			// The default loadPage options with overrides specified by
			// the caller.
			settings = $.extend( {}, $.mobile.loadPage.defaults, options ),

			// The DOM element for the page after it has been loaded.
			page = null,

			// If the reloadPage option is true, and the page is already
			// in the DOM, dupCachedPage will be set to the page element
			// so that it can be removed after the new version of the
			// page is loaded off the network.
			dupCachedPage = null,

			// determine the current base url
			findBaseWithDefault = function(){
				var closestBase = ( $.mobile.activePage && getClosestBaseUrl( $.mobile.activePage ) );
				return closestBase || documentBase.hrefNoHash;
			},

			// The absolute version of the URL passed into the function. This
			// version of the URL may contain dialog/subpage params in it.
			absUrl = path.makeUrlAbsolute( url, findBaseWithDefault() );


		// If the caller provided data, and we're using "get" request,
		// append the data to the URL.
		if ( settings.data && settings.type === "get" ) {
			absUrl = path.addSearchParams( absUrl, settings.data );
			settings.data = undefined;
		}

		// If the caller is using a "post" request, reloadPage must be true
		if(  settings.data && settings.type === "post" ){
			settings.reloadPage = true;
		}

			// The absolute version of the URL minus any dialog/subpage params.
			// In otherwords the real URL of the page to be loaded.
		var fileUrl = path.getFilePath( absUrl ),

			// The version of the Url actually stored in the data-url attribute of
			// the page. For embedded pages, it is just the id of the page. For pages
			// within the same domain as the document base, it is the site relative
			// path. For cross-domain pages (Phone Gap only) the entire absolute Url
			// used to load the page.
			dataUrl = path.convertUrlToDataUrl( absUrl );

		// Make sure we have a pageContainer to work with.
		settings.pageContainer = settings.pageContainer || $.mobile.pageContainer;

		// Check to see if the page already exists in the DOM.
		page = settings.pageContainer.children( ":jqmData(url='" + dataUrl + "')" );

		// If we failed to find the page, check to see if the url is a
		// reference to an embedded page. If so, it may have been dynamically
		// injected by a developer, in which case it would be lacking a data-url
		// attribute and in need of enhancement.
		if ( page.length === 0 && dataUrl && !path.isPath( dataUrl ) ) {
			page = settings.pageContainer.children( "#" + dataUrl )
				.attr( "data-" + $.mobile.ns + "url", dataUrl );
		}

		// If we failed to find a page in the DOM, check the URL to see if it
		// refers to the first page in the application. If it isn't a reference
		// to the first page and refers to non-existent embedded page, error out.
		if ( page.length === 0 ) {
			if ( $.mobile.firstPage && path.isFirstPageUrl( fileUrl ) ) {
				// Check to make sure our cached-first-page is actually
				// in the DOM. Some user deployed apps are pruning the first
				// page from the DOM for various reasons, we check for this
				// case here because we don't want a first-page with an id
				// falling through to the non-existent embedded page error
				// case. If the first-page is not in the DOM, then we let
				// things fall through to the ajax loading code below so
				// that it gets reloaded.
				if ( $.mobile.firstPage.parent().length ) {
					page = $( $.mobile.firstPage );
				}
			} else if ( path.isEmbeddedPage( fileUrl )  ) {
				deferred.reject( absUrl, options );
				return deferred.promise();
			}
		}

		// Reset base to the default document base.
		if ( base ) {
			base.reset();
		}

		// If the page we are interested in is already in the DOM,
		// and the caller did not indicate that we should force a
		// reload of the file, we are done. Otherwise, track the
		// existing page as a duplicated.
		if ( page.length ) {
			if ( !settings.reloadPage ) {
				enhancePage( page, settings.role );
				deferred.resolve( absUrl, options, page );
				return deferred.promise();
			}
			dupCachedPage = page;
		}

		var mpc = settings.pageContainer,
			pblEvent = new $.Event( "pagebeforeload" ),
			triggerData = { url: url, absUrl: absUrl, dataUrl: dataUrl, deferred: deferred, options: settings };

		// Let listeners know we're about to load a page.
		mpc.trigger( pblEvent, triggerData );

		// If the default behavior is prevented, stop here!
		if( pblEvent.isDefaultPrevented() ){
			return deferred.promise();
		}

		if ( settings.showLoadMsg ) {

			// This configurable timeout allows cached pages a brief delay to load without showing a message
			var loadMsgDelay = setTimeout(function(){
					$.mobile.showPageLoadingMsg();
				}, settings.loadMsgDelay ),

				// Shared logic for clearing timeout and removing message.
				hideMsg = function(){

					// Stop message show timer
					clearTimeout( loadMsgDelay );

					// Hide loading message
					$.mobile.hidePageLoadingMsg();
				};
		}

		if ( !( $.mobile.allowCrossDomainPages || path.isSameDomain( documentUrl, absUrl ) ) ) {
			deferred.reject( absUrl, options );
		} else {
			// Load the new page.
			$.ajax({
				url: fileUrl,
				type: settings.type,
				data: settings.data,
				dataType: "html",
				success: function( html, textStatus, xhr ) {
					//pre-parse html to check for a data-url,
					//use it as the new fileUrl, base path, etc
					var all = $( "<div></div>" ),

						//page title regexp
						newPageTitle = html.match( /<title[^>]*>([^<]*)/ ) && RegExp.$1,

						// TODO handle dialogs again
						pageElemRegex = new RegExp( "(<[^>]+\\bdata-" + $.mobile.ns + "role=[\"']?page[\"']?[^>]*>)" ),
						dataUrlRegex = new RegExp( "\\bdata-" + $.mobile.ns + "url=[\"']?([^\"'>]*)[\"']?" );


					// data-url must be provided for the base tag so resource requests can be directed to the
					// correct url. loading into a temprorary element makes these requests immediately
					if( pageElemRegex.test( html )
							&& RegExp.$1
							&& dataUrlRegex.test( RegExp.$1 )
							&& RegExp.$1 ) {
						url = fileUrl = path.getFilePath( RegExp.$1 );
					}

					if ( base ) {
						base.set( fileUrl );
					}

					//workaround to allow scripts to execute when included in page divs
					all.get( 0 ).innerHTML = html;
					page = all.find( ":jqmData(role='page'), :jqmData(role='dialog')" ).first();

					//if page elem couldn't be found, create one and insert the body element's contents
					if( !page.length ){
						page = $( "<div data-" + $.mobile.ns + "role='page'>" + html.split( /<\/?body[^>]*>/gmi )[1] + "</div>" );
					}

					if ( newPageTitle && !page.jqmData( "title" ) ) {
						if ( ~newPageTitle.indexOf( "&" ) ) {
							newPageTitle = $( "<div>" + newPageTitle + "</div>" ).text();
						}
						page.jqmData( "title", newPageTitle );
					}

					//rewrite src and href attrs to use a base url
					if( !$.support.dynamicBaseTag ) {
						var newPath = path.get( fileUrl );
						page.find( "[src], link[href], a[rel='external'], :jqmData(ajax='false'), a[target]" ).each(function() {
							var thisAttr = $( this ).is( '[href]' ) ? 'href' :
									$(this).is('[src]') ? 'src' : 'action',
								thisUrl = $( this ).attr( thisAttr );

							// XXX_jblas: We need to fix this so that it removes the document
							//            base URL, and then prepends with the new page URL.
							//if full path exists and is same, chop it - helps IE out
							thisUrl = thisUrl.replace( location.protocol + '//' + location.host + location.pathname, '' );

							if( !/^(\w+:|#|\/)/.test( thisUrl ) ) {
								$( this ).attr( thisAttr, newPath + thisUrl );
							}
						});
					}

					//append to page and enhance
					// TODO taging a page with external to make sure that embedded pages aren't removed
					//      by the various page handling code is bad. Having page handling code in many
					//      places is bad. Solutions post 1.0
					page
						.attr( "data-" + $.mobile.ns + "url", path.convertUrlToDataUrl( fileUrl ) )
						.attr( "data-" + $.mobile.ns + "external-page", true )
						.appendTo( settings.pageContainer );

					// wait for page creation to leverage options defined on widget
					page.one( 'pagecreate', $.mobile._bindPageRemove );

					enhancePage( page, settings.role );

					// Enhancing the page may result in new dialogs/sub pages being inserted
					// into the DOM. If the original absUrl refers to a sub-page, that is the
					// real page we are interested in.
					if ( absUrl.indexOf( "&" + $.mobile.subPageUrlKey ) > -1 ) {
						page = settings.pageContainer.children( ":jqmData(url='" + dataUrl + "')" );
					}

					//bind pageHide to removePage after it's hidden, if the page options specify to do so

					// Remove loading message.
					if ( settings.showLoadMsg ) {
						hideMsg();
					}

					// Add the page reference and xhr to our triggerData.
					triggerData.xhr = xhr;
					triggerData.textStatus = textStatus;
					triggerData.page = page;

					// Let listeners know the page loaded successfully.
					settings.pageContainer.trigger( "pageload", triggerData );

					deferred.resolve( absUrl, options, page, dupCachedPage );
				},
				error: function( xhr, textStatus, errorThrown ) {
					//set base back to current path
					if( base ) {
						base.set( path.get() );
					}

					// Add error info to our triggerData.
					triggerData.xhr = xhr;
					triggerData.textStatus = textStatus;
					triggerData.errorThrown = errorThrown;

					var plfEvent = new $.Event( "pageloadfailed" );

					// Let listeners know the page load failed.
					settings.pageContainer.trigger( plfEvent, triggerData );

					// If the default behavior is prevented, stop here!
					// Note that it is the responsibility of the listener/handler
					// that called preventDefault(), to resolve/reject the
					// deferred object within the triggerData.
					if( plfEvent.isDefaultPrevented() ){
						return;
					}

					// Remove loading message.
					if ( settings.showLoadMsg ) {

						// Remove loading message.
						hideMsg();

						//show error message
						$( "<div class='ui-loader ui-overlay-shadow ui-body-e ui-corner-all'><h1>"+ $.mobile.pageLoadErrorMessage +"</h1></div>" )
							.css({ "display": "block", "opacity": 0.96, "top": $window.scrollTop() + 100 })
							.appendTo( settings.pageContainer )
							.delay( 800 )
							.fadeOut( 400, function() {
								$( this ).remove();
							});
					}

					deferred.reject( absUrl, options );
				}
			});
		}

		return deferred.promise();
	};

	$.mobile.loadPage.defaults = {
		type: "get",
		data: undefined,
		reloadPage: false,
		role: undefined, // By default we rely on the role defined by the @data-role attribute.
		showLoadMsg: false,
		pageContainer: undefined,
		loadMsgDelay: 50 // This delay allows loads that pull from browser cache to occur without showing the loading message.
	};

	// Show a specific page in the page container.
	$.mobile.changePage = function( toPage, options ) {
		// If we are in the midst of a transition, queue the current request.
		// We'll call changePage() once we're done with the current transition to
		// service the request.
		if( isPageTransitioning ) {
			pageTransitionQueue.unshift( arguments );
			return;
		}

		var settings = $.extend( {}, $.mobile.changePage.defaults, options );

		// Make sure we have a pageContainer to work with.
		settings.pageContainer = settings.pageContainer || $.mobile.pageContainer;

		// Make sure we have a fromPage.
		settings.fromPage = settings.fromPage || $.mobile.activePage;

		var mpc = settings.pageContainer,
			pbcEvent = new $.Event( "pagebeforechange" ),
			triggerData = { toPage: toPage, options: settings };

		// Let listeners know we're about to change the current page.
		mpc.trigger( pbcEvent, triggerData );

		// If the default behavior is prevented, stop here!
		if( pbcEvent.isDefaultPrevented() ){
			return;
		}

		// We allow "pagebeforechange" observers to modify the toPage in the trigger
		// data to allow for redirects. Make sure our toPage is updated.

		toPage = triggerData.toPage;

		// Set the isPageTransitioning flag to prevent any requests from
		// entering this method while we are in the midst of loading a page
		// or transitioning.

		isPageTransitioning = true;

		// If the caller passed us a url, call loadPage()
		// to make sure it is loaded into the DOM. We'll listen
		// to the promise object it returns so we know when
		// it is done loading or if an error ocurred.
		if ( typeof toPage == "string" ) {
			$.mobile.loadPage( toPage, settings )
				.done(function( url, options, newPage, dupCachedPage ) {
					isPageTransitioning = false;
					options.duplicateCachedPage = dupCachedPage;
					$.mobile.changePage( newPage, options );
				})
				.fail(function( url, options ) {
					isPageTransitioning = false;

					//clear out the active button state
					removeActiveLinkClass( true );

					//release transition lock so navigation is free again
					releasePageTransitionLock();
					settings.pageContainer.trigger( "pagechangefailed", triggerData );
				});
			return;
		}

		// If we are going to the first-page of the application, we need to make
		// sure settings.dataUrl is set to the application document url. This allows
		// us to avoid generating a document url with an id hash in the case where the
		// first-page of the document has an id attribute specified.
		if ( toPage[ 0 ] === $.mobile.firstPage[ 0 ] && !settings.dataUrl ) {
			settings.dataUrl = documentUrl.hrefNoHash;
		}

		// The caller passed us a real page DOM element. Update our
		// internal state and then trigger a transition to the page.
		var fromPage = settings.fromPage,
			url = ( settings.dataUrl && path.convertUrlToDataUrl( settings.dataUrl ) ) || toPage.jqmData( "url" ),
			// The pageUrl var is usually the same as url, except when url is obscured as a dialog url. pageUrl always contains the file path
			pageUrl = url,
			fileUrl = path.getFilePath( url ),
			active = urlHistory.getActive(),
			activeIsInitialPage = urlHistory.activeIndex === 0,
			historyDir = 0,
			pageTitle = document.title,
			isDialog = settings.role === "dialog" || toPage.jqmData( "role" ) === "dialog";

		// By default, we prevent changePage requests when the fromPage and toPage
		// are the same element, but folks that generate content manually/dynamically
		// and reuse pages want to be able to transition to the same page. To allow
		// this, they will need to change the default value of allowSamePageTransition
		// to true, *OR*, pass it in as an option when they manually call changePage().
		// It should be noted that our default transition animations assume that the
		// formPage and toPage are different elements, so they may behave unexpectedly.
		// It is up to the developer that turns on the allowSamePageTransitiona option
		// to either turn off transition animations, or make sure that an appropriate
		// animation transition is used.
		if( fromPage && fromPage[0] === toPage[0] && !settings.allowSamePageTransition ) {
			isPageTransitioning = false;
			mpc.trigger( "pagechange", triggerData );
			return;
		}

		// We need to make sure the page we are given has already been enhanced.
		enhancePage( toPage, settings.role );

		// If the changePage request was sent from a hashChange event, check to see if the
		// page is already within the urlHistory stack. If so, we'll assume the user hit
		// the forward/back button and will try to match the transition accordingly.
		if( settings.fromHashChange ) {
			urlHistory.directHashChange({
				currentUrl:	url,
				isBack:		function() { historyDir = -1; },
				isForward:	function() { historyDir = 1; }
			});
		}

		// Kill the keyboard.
		// XXX_jblas: We need to stop crawling the entire document to kill focus. Instead,
		//            we should be tracking focus with a delegate() handler so we already have
		//            the element in hand at this point.
		// Wrap this in a try/catch block since IE9 throw "Unspecified error" if document.activeElement
		// is undefined when we are in an IFrame.
		try {
			if(document.activeElement && document.activeElement.nodeName.toLowerCase() != 'body') {
				$(document.activeElement).blur();
			} else {
				$( "input:focus, textarea:focus, select:focus" ).blur();
			}
		} catch(e) {}

		// If we're displaying the page as a dialog, we don't want the url
		// for the dialog content to be used in the hash. Instead, we want
		// to append the dialogHashKey to the url of the current page.
		if ( isDialog && active ) {
			// on the initial page load active.url is undefined and in that case should
			// be an empty string. Moving the undefined -> empty string back into
			// urlHistory.addNew seemed imprudent given undefined better represents
			// the url state
			url = ( active.url || "" ) + dialogHashKey;
		}

		// Set the location hash.
		if( settings.changeHash !== false && url ) {
			//disable hash listening temporarily
			urlHistory.ignoreNextHashChange = true;
			//update hash and history
			path.set( url );
		}

		// if title element wasn't found, try the page div data attr too
		// If this is a deep-link or a reload ( active === undefined ) then just use pageTitle
		var newPageTitle = ( !active )? pageTitle : toPage.jqmData( "title" ) || toPage.children(":jqmData(role='header')").find(".ui-title" ).getEncodedText();
		if( !!newPageTitle && pageTitle == document.title ) {
			pageTitle = newPageTitle;
		}
		if ( !toPage.jqmData( "title" ) ) {
			toPage.jqmData( "title", pageTitle );
		}

		// Make sure we have a transition defined.
		settings.transition = settings.transition
			|| ( ( historyDir && !activeIsInitialPage ) ? active.transition : undefined )
			|| ( isDialog ? $.mobile.defaultDialogTransition : $.mobile.defaultPageTransition );

		//add page to history stack if it's not back or forward
		if( !historyDir ) {
			urlHistory.addNew( url, settings.transition, pageTitle, pageUrl, settings.role );
		}

		//set page title
		document.title = urlHistory.getActive().title;

		//set "toPage" as activePage
		$.mobile.activePage = toPage;

		// If we're navigating back in the URL history, set reverse accordingly.
		settings.reverse = settings.reverse || historyDir < 0;

		transitionPages( toPage, fromPage, settings.transition, settings.reverse )
			.done(function() {
				removeActiveLinkClass();

				//if there's a duplicateCachedPage, remove it from the DOM now that it's hidden
				if ( settings.duplicateCachedPage ) {
					settings.duplicateCachedPage.remove();
				}

				//remove initial build class (only present on first pageshow)
				$html.removeClass( "ui-mobile-rendering" );

				// Send focus to the newly shown page. Moved from promise .done binding in transitionPages
				// itself to avoid ie bug that reports offsetWidth as > 0 (core check for visibility)
				// despite visibility: hidden addresses issue #2965
				// https://github.com/jquery/jquery-mobile/issues/2965
				reFocus( toPage );

				releasePageTransitionLock();

				// Let listeners know we're all done changing the current page.
				mpc.trigger( "pagechange", triggerData );
			});
	};

	$.mobile.changePage.defaults = {
		transition: undefined,
		reverse: false,
		changeHash: true,
		fromHashChange: false,
		role: undefined, // By default we rely on the role defined by the @data-role attribute.
		duplicateCachedPage: undefined,
		pageContainer: undefined,
		showLoadMsg: true, //loading message shows by default when pages are being fetched during changePage
		dataUrl: undefined,
		fromPage: undefined,
		allowSamePageTransition: false
	};

/* Event Bindings - hashchange, submit, and click */
	function findClosestLink( ele )
	{
		while ( ele ) {
			// Look for the closest element with a nodeName of "a".
			// Note that we are checking if we have a valid nodeName
			// before attempting to access it. This is because the
			// node we get called with could have originated from within
			// an embedded SVG document where some symbol instance elements
			// don't have nodeName defined on them, or strings are of type
			// SVGAnimatedString.
			if ( ( typeof ele.nodeName === "string" ) && ele.nodeName.toLowerCase() == "a" ) {
				break;
			}
			ele = ele.parentNode;
		}
		return ele;
	}

	// The base URL for any given element depends on the page it resides in.
	function getClosestBaseUrl( ele )
	{
		// Find the closest page and extract out its url.
		var url = $( ele ).closest( ".ui-page" ).jqmData( "url" ),
			base = documentBase.hrefNoHash;

		if ( !url || !path.isPath( url ) ) {
			url = base;
		}

		return path.makeUrlAbsolute( url, base);
	}


	//The following event bindings should be bound after mobileinit has been triggered
	//the following function is called in the init file
	$.mobile._registerInternalEvents = function(){

		//bind to form submit events, handle with Ajax
		$( document ).delegate( "form", "submit", function( event ) {
			var $this = $( this );
			if( !$.mobile.ajaxEnabled ||
				$this.is( ":jqmData(ajax='false')" ) ) {
					return;
				}

			var type = $this.attr( "method" ),
				target = $this.attr( "target" ),
				url = $this.attr( "action" );

			// If no action is specified, browsers default to using the
			// URL of the document containing the form. Since we dynamically
			// pull in pages from external documents, the form should submit
			// to the URL for the source document of the page containing
			// the form.
			if ( !url ) {
				// Get the @data-url for the page containing the form.
				url = getClosestBaseUrl( $this );
				if ( url === documentBase.hrefNoHash ) {
					// The url we got back matches the document base,
					// which means the page must be an internal/embedded page,
					// so default to using the actual document url as a browser
					// would.
					url = documentUrl.hrefNoSearch;
				}
			}

			url = path.makeUrlAbsolute(  url, getClosestBaseUrl($this) );

			//external submits use regular HTTP
			if( path.isExternal( url ) || target ) {
				return;
			}

			$.mobile.changePage(
				url,
				{
					type:		type && type.length && type.toLowerCase() || "get",
					data:		$this.serialize(),
					transition:	$this.jqmData( "transition" ),
					direction:	$this.jqmData( "direction" ),
					reloadPage:	true
				}
			);
			event.preventDefault();
		});

		//add active state on vclick
		$( document ).bind( "vclick", function( event ) {
			// if this isn't a left click we don't care. Its important to note
			// that when the virtual event is generated it will create
			if ( event.which > 1 || !$.mobile.linkBindingEnabled ){
				return;
			}

			var link = findClosestLink( event.target );
			if ( link ) {
				if ( path.parseUrl( link.getAttribute( "href" ) || "#" ).hash !== "#" ) {
					removeActiveLinkClass( true );
					$activeClickedLink = $( link ).closest( ".ui-btn" ).not( ".ui-disabled" );
					$activeClickedLink.addClass( $.mobile.activeBtnClass );
					$( "." + $.mobile.activePageClass + " .ui-btn" ).not( link ).blur();
				}
			}
		});

		// click routing - direct to HTTP or Ajax, accordingly
		$( document ).bind( "click", function( event ) {
			if( !$.mobile.linkBindingEnabled ){
				return;
			}

			var link = findClosestLink( event.target );

			// If there is no link associated with the click or its not a left
			// click we want to ignore the click
			if ( !link || event.which > 1) {
				return;
			}

			var $link = $( link ),
				//remove active link class if external (then it won't be there if you come back)
				httpCleanup = function(){
					window.setTimeout( function() { removeActiveLinkClass( true ); }, 200 );
				};

			//if there's a data-rel=back attr, go back in history
			if( $link.is( ":jqmData(rel='back')" ) ) {
				window.history.back();
				return false;
			}

			var baseUrl = getClosestBaseUrl( $link ),

				//get href, if defined, otherwise default to empty hash
				href = path.makeUrlAbsolute( $link.attr( "href" ) || "#", baseUrl );

			//if ajax is disabled, exit early
			if( !$.mobile.ajaxEnabled && !path.isEmbeddedPage( href ) ){
				httpCleanup();
				//use default click handling
				return;
			}

			// XXX_jblas: Ideally links to application pages should be specified as
			//            an url to the application document with a hash that is either
			//            the site relative path or id to the page. But some of the
			//            internal code that dynamically generates sub-pages for nested
			//            lists and select dialogs, just write a hash in the link they
			//            create. This means the actual URL path is based on whatever
			//            the current value of the base tag is at the time this code
			//            is called. For now we are just assuming that any url with a
			//            hash in it is an application page reference.
			if ( href.search( "#" ) != -1 ) {
				href = href.replace( /[^#]*#/, "" );
				if ( !href ) {
					//link was an empty hash meant purely
					//for interaction, so we ignore it.
					event.preventDefault();
					return;
				} else if ( path.isPath( href ) ) {
					//we have apath so make it the href we want to load.
					href = path.makeUrlAbsolute( href, baseUrl );
				} else {
					//we have a simple id so use the documentUrl as its base.
					href = path.makeUrlAbsolute( "#" + href, documentUrl.hrefNoHash );
				}
			}

				// Should we handle this link, or let the browser deal with it?
			var useDefaultUrlHandling = $link.is( "[rel='external']" ) || $link.is( ":jqmData(ajax='false')" ) || $link.is( "[target]" ),

				// Some embedded browsers, like the web view in Phone Gap, allow cross-domain XHR
				// requests if the document doing the request was loaded via the file:// protocol.
				// This is usually to allow the application to "phone home" and fetch app specific
				// data. We normally let the browser handle external/cross-domain urls, but if the
				// allowCrossDomainPages option is true, we will allow cross-domain http/https
				// requests to go through our page loading logic.
				isCrossDomainPageLoad = ( $.mobile.allowCrossDomainPages && documentUrl.protocol === "file:" && href.search( /^https?:/ ) != -1 ),

				//check for protocol or rel and its not an embedded page
				//TODO overlap in logic from isExternal, rel=external check should be
				//     moved into more comprehensive isExternalLink
				isExternal = useDefaultUrlHandling || ( path.isExternal( href ) && !isCrossDomainPageLoad );

			if( isExternal ) {
				httpCleanup();
				//use default click handling
				return;
			}

			//use ajax
			var transition = $link.jqmData( "transition" ),
				direction = $link.jqmData( "direction" ),
				reverse = ( direction && direction === "reverse" ) ||
							// deprecated - remove by 1.0
							$link.jqmData( "back" ),

				//this may need to be more specific as we use data-rel more
				role = $link.attr( "data-" + $.mobile.ns + "rel" ) || undefined;

			$.mobile.changePage( href, { transition: transition, reverse: reverse, role: role } );
			event.preventDefault();
		});

		//prefetch pages when anchors with data-prefetch are encountered
		$( document ).delegate( ".ui-page", "pageshow.prefetch", function() {
			var urls = [];
			$( this ).find( "a:jqmData(prefetch)" ).each(function(){
				var $link = $(this),
					url = $link.attr( "href" );

				if ( url && $.inArray( url, urls ) === -1 ) {
					urls.push( url );

					$.mobile.loadPage( url, {role: $link.attr("data-" + $.mobile.ns + "rel")} );
				}
			});
		});

		$.mobile._handleHashChange = function( hash ) {
			//find first page via hash
			var to = path.stripHash( hash ),
				//transition is false if it's the first page, undefined otherwise (and may be overridden by default)
				transition = $.mobile.urlHistory.stack.length === 0 ? "none" : undefined,

				// default options for the changPage calls made after examining the current state
				// of the page and the hash
				changePageOptions = {
					transition: transition,
					changeHash: false,
					fromHashChange: true
				};

			//if listening is disabled (either globally or temporarily), or it's a dialog hash
			if( !$.mobile.hashListeningEnabled || urlHistory.ignoreNextHashChange ) {
				urlHistory.ignoreNextHashChange = false;
				return;
			}

			// special case for dialogs
			if( urlHistory.stack.length > 1 && to.indexOf( dialogHashKey ) > -1 ) {

				// If current active page is not a dialog skip the dialog and continue
				// in the same direction
				if(!$.mobile.activePage.is( ".ui-dialog" )) {
					//determine if we're heading forward or backward and continue accordingly past
					//the current dialog
					urlHistory.directHashChange({
						currentUrl: to,
						isBack: function() { window.history.back(); },
						isForward: function() { window.history.forward(); }
					});

					// prevent changePage()
					return;
				} else {
					// if the current active page is a dialog and we're navigating
					// to a dialog use the dialog objected saved in the stack
					urlHistory.directHashChange({
						currentUrl: to,

						// regardless of the direction of the history change
						// do the following
						either: function( isBack ) {
							var active = $.mobile.urlHistory.getActive();

							to = active.pageUrl;

							// make sure to set the role, transition and reversal
							// as most of this is lost by the domCache cleaning
							$.extend( changePageOptions, {
								role: active.role,
								transition:	 active.transition,
								reverse: isBack
							});
						}
					});
				}
			}

			//if to is defined, load it
			if ( to ) {
				// At this point, 'to' can be one of 3 things, a cached page element from
				// a history stack entry, an id, or site-relative/absolute URL. If 'to' is
				// an id, we need to resolve it against the documentBase, not the location.href,
				// since the hashchange could've been the result of a forward/backward navigation
				// that crosses from an external page/dialog to an internal page/dialog.
				to = ( typeof to === "string" && !path.isPath( to ) ) ? ( path.makeUrlAbsolute( '#' + to, documentBase ) ) : to;
				$.mobile.changePage( to, changePageOptions );
			}	else {
				//there's no hash, go to the first page in the dom
				$.mobile.changePage( $.mobile.firstPage, changePageOptions );
			}
		};

		//hashchange event handler
		$window.bind( "hashchange", function( e, triggered ) {
			$.mobile._handleHashChange( location.hash );
		});

		//set page min-heights to be device specific
		$( document ).bind( "pageshow", resetActivePageHeight );
		$( window ).bind( "throttledresize", resetActivePageHeight );

	};//_registerInternalEvents callback

})( jQuery );