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')?'':(v=='hide')?'none':v; }
    obj.display=v; }
}

//-->



//desaparecer botones
function noboton(){
	document.getElementById('ri').style.display = "none";
	document.getElementById('cc').style.display = "none";
	document.getElementById('ca').style.display = "none";
	document.getElementById('v-n').style.display = "none";
	document.getElementById('cv-n').style.display = "none";
	document.getElementById('cv-u').style.display = "none";
	document.getElementById('fn').style.display = "none";
}
function btn_ri(){
	document.getElementById('ri').style.display = "block";
	document.getElementById('cc').style.display = "none";
	document.getElementById('ca').style.display = "none";
	document.getElementById('v-n').style.display = "none";
	document.getElementById('cv-n').style.display = "none";
	document.getElementById('cv-u').style.display = "none";
	document.getElementById('fn').style.display = "none";
}
function btn_cc(){
	document.getElementById('ri').style.display = "none";
	document.getElementById('cc').style.display = "block";
	document.getElementById('ca').style.display = "none";
	document.getElementById('v-n').style.display = "none";
	document.getElementById('cv-n').style.display = "none";
	document.getElementById('cv-u').style.display = "none";
	document.getElementById('fn').style.display = "none";
}
function btn_ca(){
	document.getElementById('ri').style.display = "none";
	document.getElementById('cc').style.display = "none";
	document.getElementById('ca').style.display = "block";	
	document.getElementById('v-n').style.display = "none";
	document.getElementById('cv-n').style.display = "none";
	document.getElementById('cv-u').style.display = "none";
	document.getElementById('fn').style.display = "none";
}
function btn_vn(){
	document.getElementById('ri').style.display = "none";
	document.getElementById('cc').style.display = "none";
	document.getElementById('ca').style.display = "none";
	document.getElementById('v-n').style.display = "block";
	document.getElementById('cv-n').style.display = "none";
	document.getElementById('cv-u').style.display = "none";
	document.getElementById('fn').style.display = "none";
}
function btn_cvn(){
	document.getElementById('ri').style.display = "none";
	document.getElementById('cc').style.display = "none";
	document.getElementById('ca').style.display = "none";
	document.getElementById('v-n').style.display = "none";
	document.getElementById('cv-n').style.display = "block";
	document.getElementById('cv-u').style.display = "none";
	document.getElementById('fn').style.display = "none";
}
function btn_cvu(){
	document.getElementById('ri').style.display = "none";
	document.getElementById('cc').style.display = "none";
	document.getElementById('ca').style.display = "none";
	document.getElementById('v-n').style.display = "none";
	document.getElementById('cv-n').style.display = "none";
	document.getElementById('cv-u').style.display = "block";
	document.getElementById('fn').style.display = "none";
}
function btn_fn(){
	document.getElementById('ri').style.display = "none";
	document.getElementById('cc').style.display = "none";
	document.getElementById('ca').style.display = "none";
	document.getElementById('v-n').style.display = "none";
	document.getElementById('cv-n').style.display = "none";
	document.getElementById('cv-u').style.display = "none";
	document.getElementById('fn').style.display = "block";
}