if (document.images) {

    /* button1 */
    but1out = new Image(); but1out.src = "navigation/button_01n.gif"; /* Standard */
    but1over = new Image(); but1over.src = "navigation/button_01mo.gif"; /* Highlight */

    /* button2 */
    but2out = new Image(); but2out.src = "navigation/button_02n.gif";
    but2over = new Image(); but2over.src = "navigation/button_02mo.gif";

    /* button3 */
    but3out = new Image(); but3out.src = "navigation/button_03n.gif";
    but3over = new Image(); but3over.src = "navigation/button_03mo.gif";

    /* button4 */
    but4out = new Image(); but4out.src = "navigation/button_04n.gif";
    but4over = new Image(); but4over.src = "navigation/button_04mo.gif";

    /* button5 */
    but5out = new Image(); but5out.src = "navigation/button_05n.gif";
    but5over = new Image(); but5over.src = "navigation/button_05mo.gif";

    /* button6 */
    but6out = new Image(); but6out.src = "navigation/button_06n.gif";
    but6over = new Image(); but6over.src = "navigation/button_06mo.gif";

    /* button7 */
    but7out = new Image(); but7out.src = "navigation/button_07n.gif";
    but7over = new Image(); but7over.src = "navigation/button_07mo.gif";

    /* button8 */
    but8out = new Image(); but8out.src = "navigation/button_08n.gif";
    but8over = new Image(); but8over.src = "navigation/button_08mo.gif";

    /* button9 */
    but9out = new Image(); but9out.src = "navigation/button_09n.gif";
    but9over = new Image(); but9over.src = "navigation/button_09mo.gif";

    /* button10 */
    but10out = new Image(); but10out.src = "navigation/button_10n.gif";
    but10over = new Image(); but10over.src = "navigation/button_10mo.gif";




    /* button11 */
    but11out = new Image(); but11out.src = "navigation/button_11n.gif";
    but11over = new Image(); but11over.src = "navigation/button_11mo.gif";




    /* button12 */
    but12out = new Image(); but12out.src = "navigation/button_12n.gif";
    but12over = new Image(); but12over.src = "navigation/button_12mo.gif";

    /* button13 */
    but13out = new Image(); but13out.src = "navigation/button_13n.gif";
    but13over = new Image(); but13over.src = "navigation/button_13mo.gif";

    /* button14 */
    but14out = new Image(); but14out.src = "navigation/button_14n.gif";
    but14over = new Image(); but14over.src = "navigation/button_14mo.gif";

    /* button15 */
    but15out = new Image(); but15out.src = "navigation/button_15n.gif";
    but15over = new Image(); but15over.src = "navigation/button_15mo.gif";

    /* button16 */
    but16out = new Image(); but16out.src = "navigation/button_16n.gif";
    but16over = new Image(); but16over.src = "navigation/button_16mo.gif";

    /* button17 */
    but17out = new Image(); but17out.src = "navigation/button_17n.gif";
    but17over = new Image(); but17over.src = "navigation/button_17mo.gif";

    /* button18 */
    but18out = new Image(); but18out.src = "navigation/button_18n.gif";
    but18over = new Image(); but18over.src = "navigation/button_18mo.gif";

  /* button19 */
    but19out = new Image(); but19out.src = "navigation/button_19n.gif";
    but19over = new Image(); but19over.src = "navigation/button_19mo.gif";







    /* zusätzliche Buttons Fahrtechnik Level + Touren Level  */






  /* button20 */


    but20out = new Image(); but20out.src = "navigation/button_20n.gif";
    but20over = new Image(); but20over.src = "navigation/button_20g.gif";




  /* button21 */
    but21out = new Image(); but21out.src = "navigation/button_21n.gif";
    but21over = new Image(); but21over.src = "navigation/button_21g.gif";




    but22out = new Image(); but22out.src = "navigation/button_22n.gif";
    but22over = new Image(); but22over.src = "navigation/button_22g.gif";




    but23out = new Image(); but23out.src = "navigation/button_23n.gif";
    but23over = new Image(); but23over.src = "navigation/button_23g.gif";


   but24out = new Image(); but24out.src = "navigation/button_24n.gif";
    but24over = new Image(); but24over.src = "navigation/button_24g.gif";


   but25out = new Image(); but25out.src = "navigation/button_25n.gif";
    but25over = new Image(); but25over.src = "navigation/button_25g.gif";





   but26out = new Image(); but26out.src = "navigation/button_26n.gif";
    but26over = new Image(); but26over.src = "navigation/button_26g.gif";

   but27out = new Image(); but27out.src = "navigation/button_27n.gif";
    but27over = new Image(); but27over.src = "navigation/button_27g.gif";

   but28out = new Image(); but28out.src = "navigation/button_28n.gif";
    but28over = new Image(); but28over.src = "navigation/button_28g.gif";

   but29out = new Image(); but29out.src = "navigation/button_29n.gif";
    but29over = new Image(); but29over.src = "navigation/button_29g.gif";

   but30out = new Image(); but30out.src = "navigation/button_30n.gif";
    but30over = new Image(); but30over.src = "navigation/button_30g.gif";












function over(name,index)
      {
           if ( index != aktuell )
           {    window.document[name].src = eval(name + "over.src");
           }
      }

      function out(name,index)
      {
           if ( index != aktuell )
           {    window.document[name].src = eval(name + "out.src");
           }
      }

    }
    else {
      alert("Leider haben Sie einen zu alten Browser.\n(Sie benötigen mindestens Netscape 3\noder Internet Explorer 4)");
    }