jquery blockUI and asp.net submit button

I have developed a payment processing form where user fills the payment details and submit the button "Pay Now" ..what i want is to block the entire UI with the message "Processing Payment..." and with a slight delay right after payment processing stored procedure executes (in code behind) it should UNBLOCK the UI. Actually i was having multiple postbacks from user due to the slight delay ...I dont want to dis开发者_如何学运维able button. how to achieve this.

Did you have a look at the BlockUI-Plugin?

http://jquery.malsup.com/block/