browserName = navigator.appName;

browserVer = parseInt ( navigator.appVersion );



version = "n2";

if ( browserName == "Netscape" && browserVer >= 3 ) version = "n3";

if ( browserName == "Microsoft Internet Explorer" && browserVer >=4 ) 
version = "e4";



if ( version == "n3" || version == "e4" )

{

  blank = new Image(106, 68);
  blank.src = "images/home_default.jpg";

  one = new Image(106, 68);
  one.src = "images/home_blue.jpg";

  blank2 = new Image(106, 68);
  blank2.src = "images/programm_default.jpg";

  two = new Image(106, 68);
  two.src = "images/programm_blue.jpg";

  blank3 = new Image(106, 68);
  blank3.src = "images/termin_default.jpg";

  three = new Image(106, 68);
  three.src = "images/termin_blue.jpg";

  blank4 = new Image(106, 68);
  blank4.src = "images/anmeldung_default.jpg";

  four = new Image(106, 68);
  four.src = "images/anmeldung_blue.jpg";

  blank5 = new Image(106, 68);
  blank5.src = "images/bilder_default.jpg";

  five = new Image(106, 68);
  five.src = "images/bilder_blue.jpg";

  blank6 = new Image(106, 68);
  blank6.src = "images/zuden_default.jpg";

  six = new Image(106, 68);
  six.src = "images/zuden_blue.jpg";

}
function button_on ( imgName )
{
        if ( version == "n3" || version == "e4" )

        {

                butOn = eval ( imgName + "_on.src" );

                document [imgName].src = butOn;

        }

}
function button_off ( imgName )
{
        if ( version == "n3" || version == "e4" )

        {

                butOff = eval ( imgName + "_off.src" );

                document [imgName].src = butOff;

        }

}