javascript - how to check the script element load event accross browser without jquery

Question

I have to do the cross-domain ajax,so I try the jsonp.

Then I will have to add the script element dynamiclly to the page,however I can not check its status.

In firefox/chrome/ie8+ I can use the

script.onLoad=function(){}
script.onError=function(){}

Also I tried

script.onreadystatechange=function(){}

in ie<8.

But it does not work in ie<8.

How to make it work?

BTW,I want to make it using the native javascript,so do not tell me using the jQuery or anything else.

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update:

In fact,the script I request from server is not a library,it is just one-line javascript code (the jsonp). So I can not using the timer to check.

Answer 1

Looking at yepnope.js it uses both onload and onreadystatechange but it also uses a timeout loop to check the readystate property of the script element, see here.