function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

timerID = null

function e(){
timerID = setTimeout("MM_showHideLayers('pordentro','','hide')",150);
}

function m(){
clearTimeout(timerID);
MM_showHideLayers('pordentro','','show');
}