Validation within a composite control with client confirmation message

 I have a composite control (basic date control) that contains a requiredfieldvalidator and a rangevalidator.  There is also a button that will save the date that was entered by the user.  When this button is pressed I want to display a confirmation message via javascript.  All this works fine except if any of the validation fails and the user selects the button the confirmation page still displays.  Now I can look through the DOM within the javascript to see if there are any validation errors and not display the confirm message, but I am looking for a cleaner way of doing this.
Is there a way I can post to the server with the button, check the validation controls, and depending on their status render a javascript confirm message or not on the client.  Is there a way to do this?
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