Just found this out the hard way – Safari froze on my iPad2 and I was stumped for a while, but it’s all sorted now.

  1. Open the Safari frozen page.
  2. Hold the On/Off button till the Power Off Slide bar shows up. Note: Do not power off though.
  3. Press and hold the Home button until the Home screen shows up.
  4. Restart your Safari app, it should be OK.

Clear safari cache and cookies Tap Settings > Safari and select Clear History, Clear Cookies, and Clear Cache.

it’s easy once you know how :/