异步加载外部Javascript
1 $.extend({ 2 loadScript : function (url, data, callback) { 3 if ($.isFunction(data)) { 4 callback = data; 5 data = null; 6 } 7 if (data != null) { 8 var urlInfo = url.match(/^([^?#]+)\?*([^#]*)#?(.*)$/); 9 url = urlInfo[1];10 var query = $.trim(urlInfo[2]);11 var fragment = $.trim(urlInfo[3]);12 if (typeof data === 'object') {13 data = $.param(data);14 }15 if (typeof data === 'string') {16 query += (query == '' ? data : ("&" + data));17 }18 query === '' || (url += ('?' + query));19 fragment === '' || (url += ('#' + fragment));20 }21 22 var script = document.createElement("script");23 script.type = "text/javascript";24 script.src = url;25 script.onload = script.onreadystatechange = function () {26 if (!document.all || document.all && this.readyState == "loaded") {27 if ($.isFunction(callback)) {28 callback();29 }30 }31 }32 document.getElementsByTagName("head")[0].appendChild(script);33 delete script;34 }35 });TAG:
