function display_city(str)
{
	//alert(str);
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("dcity").innerHTML=xmlhttp.responseText;
	//alert( document.getElementById("dimg").innerHTML);
	
    }
  }
var url= "display.php?county="+str;
//alert(url);
xmlhttp.open("GET",url,true);
xmlhttp.send();
}