//ad  <-> ecran
//ads <-> ecrans
//curAd <-> curEcran

var curEcran;
var ecrans = new Array();
var ecran_delays = new Array();
var ecran_linx = new Array();
var ecran_external = new Array();
function displayEcran() {
   var ecranLink = document.getElementById("ECRANLINK");
   var ecran = document.getElementById("ECRAN");
   if (ecrans.length) {
      ecran.src = "/ecrans/"+ecrans[curEcran];
      ecranLink.href=ecran_linx[curEcran];
      if (ecran_external[curEcran]) { ecranLink.target="_blank"; }
      else	{ ecranLink.target="_self"; }
      if (ecrans.length > 1) setTimeout("displayEcran()",ecran_delays[curEcran]*1000);
      curEcran = (++curEcran) % ecrans.length;
   }
}