function checkMail(x, filter)
{
	if (filter.test(x))	return true;
	return false;
}
function validar(form)
{
	if(form.nombre.value == '') {
		alert("Name?");
		form.nombre.focus();
		return false;
	}
	if(form.email.value == '') {
		alert("E-mail?");
		form.email.focus();
		return false;
	}
	ex_email = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if(!checkMail(form.email.value, ex_email)) {
		alert("Invalid E-mail");
		form.email.focus();
		return false;
	}
		
	document.getElementById('contacto_form').submit();
}

function validar_login(form1)
{
	if(form1.user.value == '' || form1.user.value == 'User?') {
		form1.user.className = 'form_e';
		form1.user.value = 'User?';
		form1.user.focus();
		return false;
	}
	if(form1.password.value == '' || form1.password.value == 'Password?') {
		form1.password.className = 'form_e';
		form1.password.value = 'Password?';
		form1.password.focus();
		return false;
	}
		
	document.getElementById('f_login').submit();
}