var xmlHttpcode

function chekcode(strcode)
{
//alert(strcode);


if (strcode.length==0)
  { 
  document.getElementById("txtHintcode").innerHTML="";
  return;
  }
xmlHttpcode=GetXmlHttpObjectcode();
if (xmlHttpcode==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var urlcode="checkcode.php";
urlcode=urlcode+"?q="+strcode;
urlcode=urlcode+"&sid="+Math.random();
xmlHttpcode.onreadystatechange=stateChangedcode;
xmlHttpcode.open("GET",urlcode,true);
xmlHttpcode.send(null);
} 

function stateChangedcode() 
{ 

if (xmlHttpcode.readyState==4)
{ 
//document.getElementById("txtHint").innerHTML=xmlHttp.responseText;
if (xmlHttpcode.status==200) {
            // we use a delay only for this example
			
            setTimeout('loadResultscode()',100);
			
        }
}
}

function GetXmlHttpObjectcode()
{
	
var xmlHttpcode=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttpcode=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttpcode=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttpcode=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttpcode;
} 
 function loadResultscode() {
document.getElementById("txtHintcode").innerHTML=xmlHttpcode.responseText;
document.getElementById('txtHintcode').innerHTML = '<img id="submitImage" name="submitImage" src="http://www.examsheets.net/images/loading.gif" alt="AJAX Results Ready">';
setTimeout('resetImagecode()',2000);
    
}


function resetImagecode() {
	document.getElementById("txtHintcode").innerHTML=xmlHttpcode.responseText;
}