function validate_state(src,args)
            {
                if(args.Value == "-- Select --")  
                    args.IsValid=false;
                else
                    args.IsValid=true;
            }
        function validate_city(src,args)
            {
                if(args.Value == "-- Select --")  
                    args.IsValid=false;
                else
                    args.IsValid=true;
            }    
            
            
            
            
  function search(ddlState,ddlCity)
    {
        if(document.getElementById(ddlState).value=="")
        {
        window.alert("Please Select State")
        document.getElementById(ddlState).focus();
        return false;
        }
             
        if(document.getElementById(ddlCity).value=="")
        {
        window.alert("Please Select City")
        document.getElementById(ddlCity).focus();
        return false;
        }
    }