function popUp(winURL) {
 window.open(winURL,"popup","width=650,height=600,scrollbars=no,toolbar=no,resizable=no");
}




window.onload = function() {
  if (!document.getElementsByTagName) return false;
  var lnks = document.getElementsByTagName("a");
  for (var i=0; i<lnks.length; i++) {
     if (lnks[i].className == "popup") {
      lnks[i].onclick = function() {
        popUp(this.getAttribute("href"));
        return false;
      }
    }
  }
}