function GetXmlHttpObject(handler)
{ 
	var objXmlHttp=null;

	if (navigator.userAgent.indexOf("MSIE")>=0)
	{ 
	var strName="Msxml2.XMLHTTP";
		if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
		{
		strName="Microsoft.XMLHTTP";
		} 
		try
		{ 
		objXmlHttp=new ActiveXObject(strName);
		objXmlHttp.onreadystatechange=handler;
		return objXmlHttp;
		} 
		catch(e)
		{ 
		alert("Error. Scripting for ActiveX might be disabled");
		return;
		} 
	} 

	if (navigator.userAgent.indexOf("Mozilla")>=0)
	{
	objXmlHttp=new XMLHttpRequest();
	objXmlHttp.onload=handler;
	objXmlHttp.onerror=handler;
	return objXmlHttp;
	}
}