Safari is not working on my iPad 2. It was before. The screen comes on but it looks like I am stuck??? The part of the screen where the webpage I want to browse is grey???

Try clearing Safari's cache : Settings > Safari > Clear Cache (and Clear History)

If that doesn't work then try closing Safari completely and then re-open it : from the home screen (i.e. not with Safari 'open' on-screen) double-click the home button to bring up the taskbar, then press and hold any of the apps on the taskbar for a couple of seconds or so until they start shaking, then press the '-' in the top left of the Safari app to close it, and touch any part of the screen above the taskbar so as to stop the shaking and close the taskbar.

A third option is a reset : press and hold both the sleep and home buttons for about 10 to 15 seconds (ignore the red slider), after which the Apple logo should appear - you won't lose any content, it's the iPad equivalent of a reboot.

Reset worked for me, though the directions suggested using the reset option at the bottom of the settings screen.

King_Penguin's third option is very slick. I'll use that if it happens again. Thanks, A2Ted