function GetValidHttpRequestType()
{
	/*
	Return valid client XMLHttpRequest type based on:
	
	Invalid = -1
	MSXML2.XMLHTTP.5.0 = 0
	MSXML2.XMLHTTP.4.0 = 1
	MSXML2.XMLHTTP.3.0 = 2
	MSXML2.XMLHTTP = 3
	Microsoft.XMLHTTP = 4
	XMLHttpRequest = 5
	*/
	
	if(window.XMLHttpRequest)
		return 5;
	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 ctr = 0; ctr < msxmls.length; ++ctr)
        {
			try
			{
				var obj = new ActiveXObject(msxmls[ctr]);
				return ctr;
            } catch(e) {}
		}
	}
	
	return -1;
}

function GetHttpRequestType(ReqType)
{
	switch(ReqType)
	{
	case 0:
		return new ActiveXObject('Msxml2.XMLHTTP.5.0');
	case 1:
		return new ActiveXObject('Msxml2.XMLHTTP.4.0');
	case 2:
		return new ActiveXObject('Msxml2.XMLHTTP.3.0');	
	case 3:
		return new ActiveXObject('Msxml2.XMLHTTP');	
	case 4:
		return new ActiveXObject('Microsoft.XMLHTTP');	
	case 5:
		return new XMLHttpRequest();
	}
}