function email_test(form)
{
	if(!emailValidator(form.send,"Please insert a valid email."))
			return false;
	else
	if(form.send.value=="")
	{
		alert('Please inset your email.');
		return false;
	}
	else
	return true;
}

function emailValidator(elem, helperMsg)
{
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	/*("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$*/
	if(elem.value.match(emailExp))
	{
		return true;
	}
	else
	{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}