webpart scroll bars not hiding using jquery + Sharepoint 2010

i have a sharepoint webpart page having custom webparts. one pageviewer webpart is having verticle and horizontal scroll bars. i need to remove these. webpart div has id 's4-workspace'. i am using jquery to achieve this[attr('style','overflow:hidden')]. Instead of removing the scroll of custom webpart, it removes the scroll of page itselt where these webparts are added.

so its clear that my custom jquery is getting applied to page instead of webpart.