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 $this = $( this ),
			o = $.extend({
				grid: null
			},options),
			$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 );