Disable form submit on enter key

I have used ActiveForm and formfields in one form. now this form is getting submit if i press enter key from any textbox control.is there any way to disable form submit on enter key press?

http://stackoverflow.com/questions/895171/prevent-users-from-submitting-form-by-hitting-enter

http://stackoverflow.com/questions/11235622/jquery-disable-form-submit-on-enter

Thanks that works fine.but there is no way we can do it in yii instead of jquery?