var menuNr, menuNrOld, pageLoaded;
var menu1on = new Image;  menu1on.src = "/img/menu1b.png";
var menu2on = new Image;  menu2on.src = "/img/menu2b.png";
var menu3on = new Image;  menu3on.src = "/img/menu3b.png";
var menu4on = new Image;  menu4on.src = "/img/menu4b.png";
var menu1off = new Image; menu1off.src = "/img/menu1a.png";
var menu2off = new Image; menu2off.src = "/img/menu2a.png";
var menu3off = new Image; menu3off.src = "/img/menu3a.png";
var menu4off = new Image; menu4off.src = "/img/menu4a.png";
var arrowTimer = setTimeout("menuStandardArrow()", 0);
menuNr = menuNrOld = 1; pageLoaded = false;

function menuStandard() 
{
  if(pageLoaded) 
  {
    document.menu1.src = menu1off.src;
    document.menu2.src = menu2off.src;
    document.menu3.src = menu3off.src;
    document.menu4.src = menu4off.src;
    menuStandardArrow();
  }
}

function menuStandardArrow() 
{
  if(pageLoaded) 
  {
    if(menuNr != menuNrOld) 
    {
      document["arrow"+menuNrOld].src = "/img/menu_arrow3.png"; 
      menuNrOld = menuNr;
    }
    document["arrow"+menuNr].src = "/img/menu_arrow1.png";
  }
}

function menuActivate(menuPos)
{
  if(pageLoaded) 
  {
    clearTimeout(arrowTimer);
    var imgName = "menu" + menuPos;
    document[imgName].src = eval(imgName + "on.src");
    document["arrow"+menuNrOld].src = "/img/menu_arrow3.png"; 
    document["arrow"+menuPos].src = "/img/menu_arrow2.png"; 
    menuNrOld = menuPos;   
  }
}

function menuDeactivate(menuPos)
{
  if(pageLoaded) 
  {
    var imgName = "menu" + menuPos;
    document[imgName].src = eval(imgName + "off.src");
    arrowTimer = setTimeout("menuStandardArrow()", 50);
  }
}

function menuStart(menuPos) 
{ 
  pageLoaded = true; 
  menuNr = menuPos; 
  menuStandard();
}