function GetXmlHttpObject(handler) { 
	var objXmlHttp=null;
	
	function intHandler(){
		if( objXmlHttp.readyState == 4 || objXmlHttp.readyState == 'complete' ){
			handler();
		}
	}
	
	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=intHandler;
			return objXmlHttp;
		} catch(e) { 
			alert("Error. Scripting for ActiveX might be disabled") ;
			return;
		} 
	} 
	if (navigator.userAgent.indexOf("Mozilla")>=0) {
		objXmlHttp=new XMLHttpRequest();
		objXmlHttp.onreadystatechange=intHandler;
		return objXmlHttp;
	}
}