xhttp=GetXmlHttpObject();

function showspecial()
{
	ajaxspecial();
	setTimeout('showspecial()',20000);
}


function ajaxspecial()
{

 var url ='ajax_for_special.php';

 xhttp.open('post', url); 

 xhttp.onreadystatechange = handleResponse_special; 
 xhttp.send(null);

} 

function handleResponse_special()
{ 
    if(xhttp.readyState == 4)
	{ 
        var response = xhttp.responseText;
		
		//alert(response);
		
		if(response!='')
			document.getElementById('marquee_text').innerHTML = response;
		
	}	
	
}
function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}