You can add a CSS class of cancel
to a submit button to suppress the validation
e.g
<input class="cancel" type="submit" value="Save" />
See the jQuery Validator documentation of this feature here: Skipping validation on submit
EDIT:
The above technique has been deprecated and replaced with the formnovalidate
attribute.
<input formnovalidate="formnovalidate" type="submit" value="Save" />