var xmlHttp;
function showUser(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request");
 return;
 }
var url="getuser.php";
var makeList = document.getElementById("makeList");
var selectedmake = makeList.options[makeList.selectedIndex].value;
var modelList = document.getElementById("modelList");
var selectedmodel = modelList.options[modelList.selectedIndex].value;
url=url+"?q="+selectedmake;
url=url+"&sid="+selectedmodel;
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}
function searchUser(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request");
 return;
 }
var url="getuser.php";
// var searchList = document.getElementByName("searchcn");
url=url+"?search="+str;
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txtHint").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;
}
function clickButton(e, buttonid){ 
var bt = document.getElementById(buttonid); 
if (typeof bt == 'object'){ 
if(navigator.appName.indexOf("Netscape")>(-1)){ 
if (e.keyCode == 13){ 
bt.click(); 
return false; 
} 
} 
if (navigator.appName.indexOf("Microsoft Internet Explorer")>(-1)){ 
if (event.keyCode == 13){ 
bt.click(); 
return false; 
} 
} 
}
}