var zone_menu

/*Me indica si el navegador es un explorer o se vasa en tecnologias de explorer  4 y 6*/
ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false
ns6 = (document.getElementById)? true:false

function init() {
   if (ns4) {
    zone_menu1= document.menu_item1
    zone_menu2= document.menu_item2
    zone_menu3 = document.menu_item3
    zone_menu4 = document.menu_item4
    zone_menu5 = document.menu_item5
  }
 if (ie4) {
    zone_menu1 = menu_item1.style
    zone_menu2 = menu_item2.style
    zone_menu3 = menu_item3.style
    zone_menu4 = menu_item4.style
    zone_menu5 = menu_item5.style
 }

  if (ns6) {
  zone_menu1= document.getElementById("menu_item1").style
  zone_menu2= document.getElementById("menu_item2").style
  zone_menu3= document.getElementById("menu_item3").style
  zone_menu4= document.getElementById("menu_item4").style
  zone_menu5= document.getElementById("menu_item5").style
 }

}

function visible(obj) {
 if (ns4) obj.visibility = "show"
 else if (ie4) obj.visibility = "visible"
 else if  (ns6) obj.visibility = "visible"
}

function hidden(obj) {
 if (ns4) obj.visibility = "hide"
 else if (ie4) obj.visibility = "hidden"
 else if  (ns6) obj.visibility= "hidden"
}
function cambiaImagenes(img_name, img_src){
document[img_name].src=img_src;
}

function ocultarParrafo(idParrafo){
document.getElementById(idParrafo).style.visibility="hidden";
}

function mostrarParrafo(idParrafo){
document.getElementById(idParrafo).style.visibility="visible";
}

function mostrarAclaracion(Aclaracion){/*
document.getElementById(Aclaracion).style.visibility="visible";*/
}

function ocultarAclaracion(Aclaracion){/*
document.getElementById(Aclaracion).style.visibility="hidden";*/
}