function menuSwap(cual,estado){
	if(estado==1){
		cual.firstChild.style.visibility = "hidden";
		document.getElementById(cual.firstChild.id + "2").style.visibility = "visible";
	}else{
		cual.firstChild.style.visibility = "visible";
		document.getElementById(cual.firstChild.id + "2").style.visibility = "hidden";	
	}	
}
function setVisibility(obj,estado){
	if(obj){
		obj.style.visibility = estado;
	}
}
function initMenus(){
	var menus = document.getElementById("botoneraSup").getElementsByTagName("img");
	for(var a=0;a<menus.length;a++){
		setVisibility(menus[a],"visible");
	}
}