function popup(url, name, size_and_location, attributes) {
  var tokArray1 = size_and_location.split(";");
  var bef = "";

  if(typeof tokArray1[0] !="undefined") { bef = bef +    "width=" + tokArray1[0]; }
  if(typeof tokArray1[1] !="undefined") { bef = bef + ",height=" + tokArray1[1]; }
  if(typeof tokArray1[2] !="undefined") { bef = bef +   ",left=" + tokArray1[2]; }
  if(typeof tokArray1[3] !="undefined") { bef = bef +    ",top=" + tokArray1[3]; }

  var tokArray2 = attributes.split(";");
  if(tokArray2[0]=="all") {
     bef = bef + ",location=yes";
     bef = bef + ",menubar=yes";
     bef = bef + ",resizable=yes";
     bef = bef + ",scrollbars=yes";
     bef = bef + ",status=yes";
     bef = bef + ",toolbar=yes";
  }
  else {
    for(i=0;i<tokArray2.length;i++) { bef = bef + "," + tokArray2[i] + "=yes"; }
  }

  w=eval(window.open(url, name, bef));
  w.focus();
}