function FactoryXMLHttpRequest() 
{ 
	if(window.XMLHttpRequest) 
	{
		return new XMLHttpRequest(); 
	} 
	else if(window.ActiveXObject) 
	{
		var msxmls = new Array( 'Msxml2.XMLHTTP.5.0', 'Msxml2.XMLHTTP.4.0', 'Msxml2.XMLHTTP.3.0', 'Msxml2.XMLHTTP', 'Microsoft.XMLHTTP');
		for (var i = 0; i < msxmls.length; i++) 
		{ 
			try 
			{
				return new ActiveXObject(msxmls[i]); 
			} 
			catch (e) { }
		} 
	} 
	
	throw new Error("Could not instantiate XMLHttpRequest");
}