function changeVIS(a, b)
{
	if(b=='switch'){
	var elem = document.getElementById(a);
	var actual = elem.style.display;
	 if(actual=='block'){
		 elem.style.display='none';
		 }else{
		 elem.style.display='block';	 
		 };
	}else{
	var elem = document.getElementById(a);
	elem.style.display=b;
		}
}

function veriff()
{
var name = document.getElementById("nombre").value;
var apel = document.getElementById("apellido").value;
var mail = document.getElementById("mail").value;
var user = document.getElementById("USER").value;
var pass = document.getElementById("PASS").value;
err= new Array();
if(name.length<2){err.push("nombre")};
if(apel.length<1){err.push("apellido")};
if(mail.length<5){err.push("direcci&oacute;n de e-mail")}else{
	if(mail.indexOf("@")== -1 || mail.indexOf(".") == -1){
		err.push("direcci&oacute;n de e-mail v&aacute;lida")
		};
	};
if(user.length<4){err.push("usuario de 4 caracteres o m&aacute;s")};
if(pass.length<4){err.push("password de 4 caracteres o m&aacute;s")};
lene=err.length;
derror="Error, para poder registrarse debe completar: ";
for (i=0; i<lene+1; i++)
{
	if(i<=(lene-1)){
	derror = derror+err[i];
	derror = derror+", ";
	}else{
	derror = derror+err[i];
	derror = derror+", Gracias."
}

}
if (err.length>0) { document.getElementById("FORM_error").innerHTML = derror;
}else{ document.forms[0].submit();
}

}
function enviar(a)
{
document.getElementById(a).submit();
}