function GetxmlHttpObject(handler)
{ 
	var objXmlHttp=null;
	if (navigator.userAgent.indexOf("Opera")>=0)
	{
		alert("This web site doesn't work in Opera") ;
		return ;
	}
	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;
	}
}//GetXmlHttpObject