window.onload = function(){
 var a = document.getElementsByTagName("a");
 for(var i = 0; i < a.length; i++){
  if(a[i].className.indexOf("popup") != -1 && a[i].href){
   a[i].onclick = function(){
    window.open(this.href, null, "width=300, height=500, scrollbars=yes");
    return false;
   };
   a[i].title += a[i].title ? " (Opens in a new window)" : "Visa förklaring";
  };
 };
};