SheQu/Content/B-UI/BJUI/plugins/other/respond.js

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/* Respond.js: min/max-width media query polyfill. (c) Scott Jehl. MIT Lic. j.mp/respondjs  */
(function( w ){

	"use strict";

	//exposed namespace
	var respond = {};
	w.respond = respond;

	//define update even in native-mq-supporting browsers, to avoid errors
	respond.update = function(){};

	//define ajax obj
	var requestQueue = [],
		xmlHttp = (function() {
			var xmlhttpmethod = false;
			try {
				xmlhttpmethod = new w.XMLHttpRequest();
			}
			catch( e ){
				xmlhttpmethod = new w.ActiveXObject( "Microsoft.XMLHTTP" );
			}
			return function(){
				return xmlhttpmethod;
			};
		})(),

		//tweaked Ajax functions from Quirksmode
		ajax = function( url, callback ) {
			var req = xmlHttp();
			if (!req){
				return;
			}
			req.open( "GET", url, true );
			req.onreadystatechange = function () {
				if ( req.readyState !== 4 || req.status !== 200 && req.status !== 304 ){
					return;
				}
				callback( req.responseText );
			};
			if ( req.readyState === 4 ){
				return;
			}
			req.send( null );
		},
		isUnsupportedMediaQuery = function( query ) {
			return query.replace( respond.regex.minmaxwh, '' ).match( respond.regex.other );
		};

	//expose for testing
	respond.ajax = ajax;
	respond.queue = requestQueue;
	respond.unsupportedmq = isUnsupportedMediaQuery;
	respond.regex = {
		media: /@media[^\{]+\{([^\{\}]*\{[^\}\{]*\})+/gi,
		keyframes: /@(?:\-(?:o|moz|webkit)\-)?keyframes[^\{]+\{(?:[^\{\}]*\{[^\}\{]*\})+[^\}]*\}/gi,
		comments: /\/\*[^*]*\*+([^/][^*]*\*+)*\//gi,
		urls: /(url\()['"]?([^\/\)'"][^:\)'"]+)['"]?(\))/g,
		findStyles: /@media *([^\{]+)\{([\S\s]+?)$/,
		only: /(only\s+)?([a-zA-Z]+)\s?/,