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