function ValidateEmail()
{
	var email = document.getElementById("email_address").value;
	if (ValidEmail(email))
	{
		return true;
	}
	else
	{
		alert("Please enter a valid email address");
		return false;
	}
}

function ValidEmail(Str)
{
	var invalid = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/;
	var valid = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,4})(\]?)$/;

	return (!invalid.test(Str) && valid.test(Str))
}