new_contents: # emulate behaviour of other browsers
  def focus(elem):
      JS("""
          try {
              elem.focus();
          } catch (e) {
              // Only trap the exception if the attempt was mostly legit
              if (!elem || !elem.focus) {
                  // Rethrow the probable NPE or invalid type
                  throw e;
              }
          }
      """)
  
subject: add ie6 specific Focus.focus function