JavaScript 动态加载文件

var loadFile = function(url, fn) {

Aby.loadFileComplete = false;

var doc = document.getElementsByTagName('head')[0];

var js = null;

if (url && url.substring(url.length - 3).toLowerCase() == ".js") {

js = document.createElement('script');

js.setAttribute('type', 'text/javascript');

js.setAttribute('src', Aby.loadFileNoCache ? Aby.urlAppend(url,

"nocache=" + new Date().getTime()) : url);

js.setAttribute('originalUrl', url);

doc.appendChild(js);

} else {

js = document.createElement('link');

js.setAttribute('type', 'text/css');

js.setAttribute("rel", "stylesheet");

js.setAttribute('originalUrl', url);

js.setAttribute('href', Aby.loadFileNoCache ? Aby.urlAppend(url,

"nocache=" + new Date().getTime()) : url);

doc.appendChild(js);

}

var flag = false;

try {

if (!Aby.isIE) {

js.onload = function() {

fn(js);

}

} else {

js.onreadystatechange = function() {

if (js.readyState == 'loaded' || js.readyState == 'complete') {

if (typeof fn == "function")

fn(js);

}

}

}

} catch (e) {

}

};