when i clicking a button inside jquery popup.its close

when i clicking a asp.net button it is jquery modal pop up closed..but i want it should not closed.my design inside jquery modal should be like.two textbox,and two button...one for close. another for submit..if i click on close button.. jquery modal popup will close...if i click on submit button it should not be close untill..all the validation was done of the text fileds inside jquery modal