var xmlHttp

function _doPopulateCity(conname)

{
    //alert(conname);
	var url="citypopulate.php?conname=" + conname;

	xmlHttp = GetXmlHttpObject(ReturnCity)

	xmlHttp.open("GET", url , true)

	xmlHttp.send(null)

}
function ReturnCity() {

	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {

		document.getElementById("popcity").innerHTML = xmlHttp.responseText;

	}	

}
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

	}

}