I know that may sound silly, but I'm trying to submit a form on a page inside an iFrame, from the parent site.

Here's an example of the form:

        <form action="/add_email" method="post"> 
        <div class="field"> 
            <label for="newEmailAddress" style="width: auto">Add new email address</label> 
            <input type="text" id="newEmailAddress" name="email" value="null" class="text-field" /> 
            <input type="hidden" name="__app_key" value="null"/> 
            <input type="submit" value="Add address and send activation email"> 
        </div> 
        </form>

As you can see, the Submit button, and the form itself both lack a proper name or id, this is not something I have control over. (It's on an external website.)

Any suggestions?