jquery-mobile/js/jquery.mobile.grid.js

/*
* jQuery Mobile Framework : plugin for creating CSS grids
* Copyright (c) jQuery Project
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*/ 
(function($, undefined ) {
$.fn.grid = function(options){
	return this.each(function(){
		var o = $.extend({
			grid: null
		},options);
	
			
		var $kids = $(this).children(),
			gridCols = {solo:1, a:2, b:3, c:4, d:5},
			grid = o.grid,
			iterator;
			
			if( !grid ){
				if( $kids.length <= 5 ){
					for(var letter in gridCols){
						if(gridCols[letter] == $kids.length){ grid = letter; }
					}
				}
				else{
					grid = 'a';
				}
			}
			iterator = gridCols[grid];
			
		$(this).addClass('ui-grid-' + grid);
	
		$kids.filter(':nth-child(' + iterator + 'n+1)').addClass('ui-block-a');
		if(iterator > 1){	
			$kids.filter(':nth-child(' + iterator + 'n+2)').addClass('ui-block-b');
		}	
		if(iterator > 2){	
			$kids.filter(':nth-child(3n+3)').addClass('ui-block-c');
		}	
		if(iterator > 3){	
			$kids.filter(':nth-child(4n+4)').addClass('ui-block-d');
		}	
		if(iterator > 4){	
			$kids.filter(':nth-child(5n+5)').addClass('ui-block-e');
		}
				
	});	
};
})(jQuery);