var URL = unescape(location.href)	
var xstart = URL.lastIndexOf("/") + 1
var xend = URL.length
var hereName = URL.substring(xstart,xend)
var url2=unescape(hereName)	
var xend2 = url2.lastIndexOf("?")
if (xend2>-1)
	{
	var final=hereName.substring(0,xend2)
	var nom_pagina=final.replace(/.php/,"")
	}
else
	{
	var nom_pagina=hereName.replace(/.php/,"")
	}


function comprobar_mail(email){
	var filter=/^[A-Za-z0-9][A-Za-z0-9_\.]*@[A-Za-z0-9_]+.[A-Za-z0-9_.]+[A-za-z]$/;
	var aux = filter.test(email);
	if(aux == true)
		return false;
	return true;
}


function valida_form(){
		if(document.formulario.mail.value==""){
			alert("Ingrese el e-mail");
			document.formulario.txt_mail.focus();
		}else{
			if(comprobar_mail(document.formulario.mail.value)){
				alert("El e-mail ingresado no es correcto");
				document.form1.txt_mail.focus();
			}else{
				document.formulario.action="formulario.php"
					document.formulario.submit();
			}
			
		}
	}