// Initalize the global variable.
  var btnPressed ="";

  function setfocus(fieldName)
  {
   if (fieldName == null) {
     alert("Der opstod en fejl: Parameter fieldName er null ...");
   }
   else {
     var curElement = document.getElementById(fieldName);
     if (curElement != null) {
       curElement.focus();
     }
   }
  }