/*****

Credits:
Jeremy Keith
Read his book "DOM SCRIPTING", ISBN: 1590595335

**/

function doPopups() {
var hauteur = 380;
var largeur = 420;
var haut=(screen.height-hauteur)/2; //add to center popup
var gauche=(screen.width-largeur)/2; //
var lesOptions = "scrollbars=auto, resizable=yes";

  if (!document.getElementsByTagName) return false;
  var links=document.getElementsByTagName("a");
  for (var i=0; i < links.length; i++) {
    if (links[i].className.match("popup")) {
      links[i].onclick=function() {
      // Next two lines should be on one line
        window.open(this.href, "","top="+haut+",left="+gauche+",width="+largeur+",height="+hauteur+","+lesOptions);
        return false;
      }
    }
  }
}