function validar_form2()
{
	
	email=document.Form2.email.value;
	

	if(email=='' || !validaCorreo(email)){ 
		if(email==''){
			alert("Usted debe escribir su email");
		}
		else{
			alert("El email escrito no es valido");
		}

		document.Form2.email.style.background="red";
		return(false);
	}
	else{
		document.Form2.email.style.background="white";
	}


function validaCorreo(valor)
{
	var reg=/(^[a-zA-Z0-9._-]{1,30})@([a-zA-Z0-9.-]{1,30}$)/;
	if(reg.test(valor)) return true;
	else return false;
}
}