if (document.images) {
  menu0up = new Image();
  menu0up.src = "images/menubar/menubar0.png";
  menu0down = new Image();
  menu0down.src = "images/menubar/menubar0over.png";
  menu1up = new Image();
  menu1up.src = "images/menubar/menubar2.png";
  menu1down = new Image();
  menu1down.src = "images/menubar/menubar2over.png";
  menu2up = new Image();
  menu2up.src = "images/menubar/partners.png";
  menu2down = new Image();
  menu2down.src = "images/menubar/partnersover.png";
  menu3up = new Image();
  menu3up.src = "images/menubar/menubar6.png";
  menu3down = new Image();
  menu3down.src = "images/menubar/menubar6over.png";
  menu4up = new Image();
  menu4up.src = "images/menubar/menubar8.png";
  menu4down = new Image();
  menu4down.src = "images/menubar/menubar8over.png";
  menu5up = new Image();
  menu5up.src = "images/menubar/menubar10b.png";
  menu5down = new Image();
  menu5down.src = "images/menubar/menubar10bover.png";
  menu6up = new Image();
  menu6up.src = "images/menubar/menubar12.png";
  menu6down = new Image();
  menu6down.src = "images/menubar/menubar12over.png";
}
function buttondown(buttonname) {
  if (document.images) {
    document.getElementById(buttonname).src = eval(buttonname + "down.src");
  }
}
function buttonup(buttonname) {
  if (document.images) {
    document.getElementById(buttonname).src = eval(buttonname + "up.src");
  }
}