/** Init a XMLHTTPRequest Object
**/
function getXMLHTTP()
{
	var xhr = null;
	
	if (window.XMLHttpRequest) // For Firefox and others
	{
		xhr = new XMLHttpRequest();

		if (xhr.overrideMimeType) {
			xhr.overrideMimeType("text/xml");
		}
	}
	else if (window.ActiveXObject) // For Internet Explorer
	{
		try
		{
			xhr = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				xhr = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e1)
			{
				xhr = null;
			}
		}
	}
	else // If Ajax is not supported by the computer
	{
		alert('AJAX NOT SUPPORTED');
	}

	return xhr;
}