window.XMLHttpRequest is undefined in IE7/IE8

Question

Value of window.XMLHttpRequest is Undefined when i run my application even in IE7 or IE8, Is there anything i have to enable in IE7 to make it work.

Thanks

Answer 1

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

Answer 2

You can do something like this:

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.

Answer 3

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

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