function addClass(node, level)
{
  if(browserIsIE())
    node.className = "level" + level + " over" + level;
}

function removeClass(node, level)
{
  if(browserIsIE())
    node.className = "level" + level;
}

function showMenu(node, level)
{
  node.className = "level" + level;
}

//Internet explorer detect
function browserIsIE()
{
  var detect = navigator.userAgent.toLowerCase();
  if (checkIt('msie'))
    return true;  
  return false;
  
  function checkIt(string)
  {
	  if ((detect.indexOf(string) + 1) && !(detect.indexOf('opera') + 1)) //hvis msie og ikke opera!!! :-)
	    return true;
	  return false;
  }
}