window.XMLHttpRequest在IE7/IE8中未定义-window.XMLHttpRequestisundefinedinIE7/IE8

8  

You can do something like this:

你可以这样做:

if (!window.XMLHttpRequest) {
  window.XMLHttpRequest = function() {
    return new ActiveXObject('Microsoft.XMLHTTP');
  };
}

I recommend looking at an AJAX library though, life is much easier in jQuery, ExtJS, MooTools, whatever you prefer.

我建议查看一个AJAX库,jQuery,ExtJS,MooTools的生活更容易,无论你喜欢什么。

2  

I enabled the native XMLHTTP support from internet options, after this the my code started working fine.

我从Internet选项启用了原生XMLHTTP支持,之后我的代码开始正常工作。

1  

https://gist.github.com/jed/993585/#comment-40084

var xhr = (function(){
    try{
        return new(this.XMLHttpRequest||ActiveXObject)('MSXML2.XMLHTTP.3.0');
    } catch(e) {};
}());