When user clicks a button / href application redirect to external application.
Client gave the following requirements, as user does not saturate with same request.
So ask us to disabled the button / href for 5 seconds when user click particular button / href.
Also, please use real words when posting to the forums. Abbreviations such as "Reg" in place of whatever it is supposed to mean only serve to make your posts more difficult to read and less likely to generate useful responses.