Maybe you just need to do a bit of maintenance.
Go to Settings > Safari and click Clear History and Clear Cache
You could also clear cookies but that would mean no websites would remember your log in details.
If you have other browser apps installed do the same with them. (Perfect Web Browser or Skyfire Browser for instance)
On the home screen double click the Home button (middle bottom)
Hold down one of the icons displayed on the bottom bar and minus signs will appear.
Click on those to clear them from memory...do the lot, it wont effect access to them again.
Click the Home button to return to normal conditions.
When you aren't going to be using the iPad for a while turn it completely off by holding down the Sleep button until the slider bar appears at the top of the screen and slide that across.
If things start to stick or act strangely try the iPad equivalent of a reboot by holding down the Sleep and Home buttons simultaneously ignoring the red slider that appears at the top, in about 10 seconds or so the iPad will reboot.
If it seizes up completely at some stage then use iTunes on your computer to Restore it factory settings. iTunes will then reinstall everything, assuming you've done a Sync recently to provide a backup.