MVC :: Using DataAnnotation Validation On A View With Multiple Forms?

I've got a view with 2 forms on it - one to login and the other to register. My problem is that the client-side validation from MicrosoftMvcValidation is firing regardless of which form I submit - because my forms are rendering the inputs with the same id e.g.

<input id="User_Email"
name="User.Email" type="text"
value="" />

How can I change the generated forms to create different id's for the inputs in such a way that the validation works?

I'm using a strongly-typed view with a model with this property:

Model property:

[Required(ErrorMessage = "Please enter an email address")]
public string Email { get; set; }

First form:

<% using (Html.BeginForm("LogOn", "Account")) { %>
<%= Html.ValidationMessageFor(m => m.User.Email) %>
<%= Html.TextBoxFor(m => m.User.Email) %><% } %>

Second form:

<% using (Html.BeginForm("Register", "Account")) { %>
<%= Html.ValidationMessageFor(m => m.User.Email) %>
<%= Html.TextBoxFor(m => m.User.Email) %><% } %>


My second form produces id's identical to the first form which is causing the problem.

Is it possible to specify the difference in the Html helper on the view or do I need to provide 2 seperate models somehow? I'm a bit in the dark.