// JavaScript Document
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
		}
}