怎么判断一个外部的js已经加载完毕

JavaScript025

怎么判断一个外部的js已经加载完毕,第1张

var oScript = document.createElement("script")

  oScript.type = "text\/javascript"

  oScript.onerror = loadError

  oScript.onload = fOnload

  document.currentScript.parentNode.insertBefore(oScript, document.currentScript)

  oScript.src = sSrc

使用这个HTMLScriptElement对象的onload函数可以判断加载完毕，用onerror判断加载失败。

代码如下：

复制代码 代码如下:

document.onreadystatechange = subSomething//当页面加载状态改变的时候执行这个方法.

function subSomething()

{

if(document.readyState == “complete”) //当页面加载状态

myform.submit()//表单提交

}

页面加载readyState的五种状态

原文如下:

0: (Uninitialized) the send( ) method has not yet been invoked.

1: (Loading) the send( ) method has been invoked, request in progress.

2: (Loaded) the send( ) method has completed, entire response received.

3: (Interactive) the response is being parsed.

4: (Completed) the response has been parsed, is ready for harvesting.