var navigateur = navigator.appName.substring(0,3);
var x = window.top.screenLeft;
var y = window.screenY;

function popupcentre(page,largeur,hauteur,options)
{
 if (navigateur == "Mic")
 {
  var x = window.top.screenLeft;
  var y = window.top.screenTop;
  var lng = document.body.clientWidth;
  var hat = document.body.clientHeight;
  
  var left = x + (lng / 2) - (largeur / 2);
  var top = (y + (hat / 2) - (hauteur / 2)) - 14;
 } 
 else 
 {
  if (window.screenX && window.innerWidth)
  {
   var x = window.screenX;
   var y = window.screenY;
   var lng = window.innerWidth;
   var hat = window.innerHeight;
   
   if (navigateur == "Ope")
   {
    var left = ((lng / 2) + x) - (largeur / 2);
    var top = ((hat / 2) + y) - (hauteur / 2) + 36;
   }
   else
   {
    var left = ((lng / 2) + x) - (largeur / 2);
    var top = ((hat / 2) + y) - (hauteur / 2) + 100;
   }
  }
  else
  {
   var left = 10;
   var top = 10;
  }
 }
 window.open(page,'Edition',"top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}