var xmlHttp
function showCity(state_id)
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
 document.getElementById("city_id").disabled=true;
var url="http://busneeds.com/getCity.php"
url=url+"?state_id="+state_id+"&sid="+Math.random()
xmlHttp.open("GET",url,true)
xmlHttp.onreadystatechange=stateMoved 
xmlHttp.send(null)
}function stateMoved() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
document.getElementById("add_city_div").innerHTML=xmlHttp.responseText;
document.getElementById("city_id").disabled=false;
 } 
}
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;
}