function BtnMouseOver(Element) {
    if (Element.id == "Btn01" || Element.id == "Btn02" || Element.id == "Btn03" || Element.id == "Btn04")
    Element.style.backgroundImage = 'url("./res/css/gr/Control' + Element.id + '_ov.gif")';
  }

  function BtnMouseDown(Element) {
    if (Element.id == "Btn01" || Element.id == "Btn02" || Element.id == "Btn03" || Element.id == "Btn04")
    Element.style.backgroundImage = 'url("./res/css/gr/Control' + Element.id + '_down.gif")';
  }

  function PreLoadImages() {

    for (i = 0; i < PreLoadImages.arguments.length; i++) {
      img = new Image();
      img.src = PreLoadImages.arguments[i];
    }

  }

  function BtnMouseClick(Element) {

    switch (Element.id) {

      case "Btn01":
        history.back();
        break;

      case "Btn02":
        location.href = '/Home.html';
        break;

      case "Btn03":
        location.href = '/Home.html';
        break;

      case "Btn04":
        history.forward();
        break;

      case "Btn05":
        location.href = '/Download.html';
        break;

      case "Btn06":
        location.href = '/Screenshots.html';
        break;

      case "Btn07":
        if (confirm('Dieser Link bringt sie auf das offizielle Board des KM Player in Korea\n(Koreanisch/Englisch)\n\nFortfahren?'))
          window.open('http://www.kmplayer.com', 'KMPlayer');
        break;

      case "Btn08":
        location.href = '/Info.html';
        break;

      case "Btn09":
        location.href = '/History.html';
        break;
    }
  }

  function BtnMouseOut(Element) {
    Element.style.backgroundImage = 'url("./res/css/gr/Control' + Element.id + '.gif")';
  }

  PreLoadImages('./res/css/gr/ControlBtn01_ov.gif',
                './res/css/gr/ControlBtn02_ov.gif',
                './res/css/gr/ControlBtn03_ov.gif',
                './res/css/gr/ControlBtn04_ov.gif',
                './res/css/gr/ControlBtn05_ov.gif',
                './res/css/gr/ControlBtn06_ov.gif',
                './res/css/gr/ControlBtn07_ov.gif',
                './res/css/gr/ControlBtn08_ov.gif',
                './res/css/gr/ControlBtn09_ov.gif',
                './res/css/gr/ControlBtn01_down.gif',
                './res/css/gr/ControlBtn02_down.gif',
                './res/css/gr/ControlBtn03_down.gif',
                './res/css/gr/ControlBtn04_down.gif',
                './res/css/gr/ControlBtn05_down.gif',
                './res/css/gr/ControlBtn06_down.gif',
                './res/css/gr/ControlBtn07_down.gif',
                './res/css/gr/ControlBtn08_down.gif',
                './res/css/gr/ControlBtn09_down.gif'
                );