var xmlHttp;

function modify_session(strTable, catId, pageId)
{
    xmlHttp=GetXmlHttpObject();
    if (xmlHttp==null)
     {
     alert("Browser does not support HTTP Request");
     return 0;
     }

    var url="modify_session.php";
    url=url+"?table="+strTable;
    url=url+"&catId="+catId;
    url=url+"&pageId="+pageId;
    xmlHttp.onreadystatechange=stateChanged;
    xmlHttp.open("GET",url,true);
    xmlHttp.send(null);
}

function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 {
    fo.write("diaporama");
 }
}

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;
}