function GetXmlHttpObject(handler)
{
	var objXmlHttp=null

	if (navigator.userAgent.indexOf("Opera")>=0)
	{
		alert("This example 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
	}
}