Hi,<BR>I have a group of txtboxes that need to be validated when Button_A is clicked. On the same page, I have another group of txtboxes that are validated when Button_B is clicked. (I am using the RequiredFieldValidator control)<BR>Either button is clicked, ALL txtboxes are validated.<BR>It could resolve the problem if enableClientScript is false and the appropriate validation controls are disabled when one of the buttons is clicked. But how to sort this out on the client side?<BR>Any idea? Thanks.