function doChange(vSelVal,CityId)
{               
	if(vSelVal !="")
	{
		var currentTime = new Date();
		vHours = currentTime.getHours();
		vMinutes =currentTime.getMinutes();
		vSeconds = currentTime.getSeconds();
		currentTime = vHours+"-"+vMinutes+"-"+vSeconds;	
	
                xmlHttp=GetXmlHttpObject()
                if (xmlHttp==null)
                {
                        alert ("Browser does not support HTTP Request");
                        return;
                }
                var url=vBaseURL + "/cityList.php"
                url=url+"?pid="+vSelVal
                url=url+"&CityId="+CityId     
                url=url+"&vers="+currentTime          
                xmlHttp.onreadystatechange=stateChanged 
                xmlHttp.open("GET",url,true)
                xmlHttp.send(null);
        }
        else
        {
        	document.getElementById("cboCity").options.length=1;
        }
}
function stateChanged() 
{ 
        if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
        { 
                document.getElementById("dvCity").innerHTML=xmlHttp.responseText;
        } 
}
function GetXmlHttpObject()
{
        var xmlHttp=null;
        try
         {
                 // Firefox, Opera 8.0+, Safari
                 xmlHttp=new XMLHttpRequest();
         }
        catch (e)
         {
                 //Internet Explorer
                 try
                  {
                  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
                  }
                 catch (e)
                  {
                  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
                  }
         }
        return xmlHttp;
}