以下代码是摘自news.qq.com页面里的代码的,本人未进行测试,程序看着应该没有问题的,可以做为参考的,主要用来在网页底部位置,实现动态加载js文件到网页<head>标签的后面,通过DOM来实现的,代码如下:
| <script> | |
| var SCRIPT_TIMEOUT = 20000; | |
| var QVPL_PATH = "http://mat1.gtimg.com/bb/html5/QVPL1.0.0.js"; | |
| function loadHelper (jsurl) { | |
| var oScriptEl, oTimeoutHDL, oHead; | |
| oScriptEl = document.createElement("script"); | |
| oScriptEl.type = "text/javascript"; | |
| oScriptEl.language = "javascript"; | |
| oScriptEl.src = jsurl; | |
| oScriptEl.onreadystatechange = doCallback; | |
| oScriptEl.onload = function() | |
| { | |
| this.readyState = "complete"; | |
| doCallback(); | |
| if(typeof(lianbo) == "object"){ | |
| lianbo.init(window.QVPL); | |
| } | |
| }; | |
| oTimeoutHDL = window.setTimeout(doError,SCRIPT_TIMEOUT); | |
| document.getElementsByTagName("head")[0].appendChild(oScriptEl); | |
| function doCallback() | |
| { | |
| if (oScriptEl.readyState == "complete" || oScriptEl.readyState == "loaded") | |
| { | |
| oScriptEl.onload = oScriptEl.onreadystatechange = new Function(); | |
| window.clearTimeout(oTimeoutHDL); | |
| } | |
| }; | |
| function doError() | |
| { | |
| oScriptEl.parentNode.removeChild(oScriptEl); | |
| }; | |
| } | |
| loadHelper(QVPL_PATH); | |
| </script> |
