Best method of Instantiating an XMLHttpRequest object

Question

What is the best method for creating an XMLHttpRequest object?

It should work in all capable browsers.

Answer 1

This is what I use, it works fine for me:

    function request()
    {
        try
        {
            try
            {
                return new ActiveXObject("Microsoft.XMLHTTP")
            }
            catch( e )
            {
                return new ActiveXObject("Msxml2.XMLHTTP")
            }
        }
        catch(e) 
        {
            return new XMLHttpRequest()
        }
    }

Answer 2

Use jQuery (or a similar JavaScript library). It takes care of the cross-browser compatibility issues of things like making Ajax calls.

For example, using the jQuery Ajax call:

$.ajax({
    url: 'document.xml',
    type: 'GET',
    dataType: 'xml',
    timeout: 1000,
    error: function(){
        alert('Error loading XML document');
    },
    success: function(xml){
        // do something with xml
    }
});

Answer 3

Use XMLHttpRequest.js - Standard-compliant cross-browser XMLHttpRequest object implementation and work with the object in a standard (W3C) way