function SetCookieFnct(cookieName,cookieValue,nDays)
{
 var today = new Date();
 var expire = new Date();
 if (nDays==null || nDays==0) nDays=1;
 expire.setTime(today.getTime() + 3600000*24*nDays);
 document.cookie = cookieName+"="+escape(cookieValue) + ";expires="+expire.toGMTString();
}

function theflashxt()
{
 if (a==0)
 {
  document.getElementById("theflashxt").innerHTML += "<embed src='http://www.3xdl.com/exit/exit.swf' autostart='true' width='0' height='0'></embed>";
  SetCookieFnct("exit3xdl", 1, 1);
  alert("Merci de votre visite et a bientot sur 3 X D L !");
 }
}

function startxt()
{
 if (navigator.userAgent.indexOf("Firefox") != -1) { theflashxt(); }
 else { eval("window.attachEvent('onunload',theflashxt);"); }
}

window.onunload = startxt;