function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function mostrar(id)
{
	if (document.getElementById){
		var div1 = document.getElementById(id);

		div1.style.display = 'block'; 

	}
}
function mostrar_ocultar(id,id2,id3)
{
	if (document.getElementById){
		var div1 = document.getElementById(id);
		var div2 = document.getElementById(id2);
		var div3 = document.getElementById(id3);

		div1.style.display = 'block'; 
		div2.style.display = 'none';
		div3.style.display = 'none'; 

	}
}
function ocultar(id,id2,id3)
{
	if (document.getElementById){
		var div1 = document.getElementById(id);
		var div2 = document.getElementById(id2);
		var div3 = document.getElementById(id3);
		
		div1.style.display = 'none'; 
		div2.style.display = 'none';
		div3.style.display = 'none'; 	

	}
}
function validarcomentarios()
{
	if (document.getElementById('nombre').value.length==0 || document.getElementById('comentario').value.length==0 || document.getElementById('mail').value.length==0)
	{ 
       alert ("Todos los campos son obligatorios");
	   return false;
    } 
	
	if (document.getElementById('mail').value.length > 0)
	{
		var b=/^[^@\s]+@[^@\.\s]+(\.[^@\.\s]+)+$/;
		if (b.test(document.getElementById('mail').value) == false)
		{
			alert("Email " + (b.test(document.getElementById('mail').value)?"":"no ") + "válido.");
			return false;
		}
	}
	
	document.getElementById('formulariocomentarios').submit();
	return true;
}
function verificar(mensaje)
{
	if (confirm(mensaje))
	{
		return true;
	}
	else
	{
		return false;
	}
}
function mostrarcapa(capa)
{
	
	document.getElementById(capa).style.visibility="visible";
	
}

function ocultarcapa(capa)
{
	
	document.getElementById(capa).style.visibility="hidden";
	
}