// JavaScript Document
function ValidaForm() {

function alerta(){
	alert("Name, Last Name, eMail are required fields");
	}

	var f = document.formulario;

	if (f.name.value == "")
	{
		alerta();
		f.name.focus();
		return false;
	}

	if (f.lastname.value == "")
	{
		alerta();
		f.lastname.focus();
		return false;
	}
	
	if (f.email.value == "")
	{
		alerta();
		f.email.focus();
		return false;
	}
	
	if(!checkemail(f.email.value))
	{
		alert("Please type your email as:  name@domain.com");
		f.email.focus();
		return false;
	}
	

}

function checkemail(str)
{
  		var filter=/^.+@.+\..{2,3}$/
  		return (filter.test(str))

}