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")
}