function MM_showHideLayers() { //v9.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) 
  with (document) if (getElementById && ((obj=getElementById(args[i]))!=null)) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function showhide(state) {
   var cacheobj = document.getElementById("downmenu").style
   if (state == 0)
      cacheobj.visibility = "hidden"
   else
      cacheobj.visibility = cacheobj.visibility == "hidden" ? "visible" : "hidden"
}

function showhide2(state) {
   var cacheobj = document.getElementById("downmenu2").style
   if (state == 0)
      cacheobj.visibility = "hidden"
   else
      cacheobj.visibility = cacheobj.visibility == "hidden" ? "visible" : "hidden"
}

function showhide3(state) {
   var cacheobj = document.getElementById("downmenu3").style
   if (state == 0)
      cacheobj.visibility = "hidden"
   else
      cacheobj.visibility = cacheobj.visibility == "hidden" ? "visible" : "hidden"
}

function showhide4(state) {
   var cacheobj = document.getElementById("downmenu_all").style
   if (state == 0)
      cacheobj.visibility = "hidden"
   else
      cacheobj.visibility = cacheobj.visibility == "hidden" ? "visible" : "hidden"
}