var xmlHttp
function disp_ser()
{
document.getElementById("ser_result").style.visibility="";
var veh_id=document.getElementById("Select_Viechle").value;
var year_id=document.getElementById("Model_Year").value;
var par_id=document.getElementById("Select_Part").value;
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
var url="search_parts.php?vehi_id="+veh_id+" & yeari_id="+year_id+" & pari_id="+par_id+""
xmlHttp.onreadystatechange=stateChanged
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}


function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("ser_result").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;
}