function detectScreenSize() {

  var width;
  var height;

  if (parseInt(navigator.appVersion)>3) {
   width = screen.width;
   height = screen.height;
  }
  else if (navigator.appName == "Netscape" 
    && parseInt(navigator.appVersion)==3
    && navigator.javaEnabled()
  ) {
   var toolkit = java.awt.Toolkit.getDefaultToolkit();
   var size = toolkit.getScreenSize();
   width = size.width;
   height = size.height;
  }
  return {width: width, height: height};
}