if (document.images) {
  var menu01n = new Image()
  menu01n.src = "images/menu01n.gif"
  var menu01a = new Image()
  menu01a.src = "images/menu01a.gif"
  
  var menu02n = new Image()
  menu02n.src = "images/menu02n.gif"
  var menu02a = new Image()
  menu02a.src = "images/menu02a.gif"
  
  var menu03n = new Image()
  menu03n.src = "images/menu03n.gif"
  var menu03a = new Image()
  menu03a.src = "images/menu03a.gif"
  
  var menu04n = new Image()
  menu04n.src = "images/menu04n.gif"
  var menu04a = new Image()
  menu04a.src = "images/menu04a.gif"
  
  var menu05n = new Image()
  menu05n.src = "images/menu05n.gif"
  var menu05a = new Image()
  menu05a.src = "images/menu05a.gif"
  
}

function act(imgName) {
  if (document.images) 
    document[imgName].src = eval(imgName + 'a.src')
}

function inact(imgName) {
  if (document.images)
    document[imgName].src = eval(imgName + 'n.src')
}
// -->