var xmlHttp
var oldel;

function tabb(w,id,el)
{ 

xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
  
var url="tab.php";
url=url+"?tab="+w;
url=url+"&id="+id;
url=url+"&sid="+Math.random();



if (oldel == undefined)
{
document.getElementById(el).className = "tab";
}else{
document.getElementById(oldel).className = "tab";
}
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
document.getElementById(el).className = "active";


oldel=el;


}

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