I have a webform with an ImageButton, that pops up a calendar control, and two regular buttons below it. If a user is typing into the textbox and presses enter, the ImageButton acts as the submit button. How can I get the regular button below to act as the submit button?

I see that regular buttons have the "UseSubmitBehavior" property, but the ImageButton does not. How can I specify which button acts as the submit button?

Thanks,

Jerry