internet explorer quits

Hi
Can anybody help solve this problem with i.e.? On one site I visit, when I go to view another page, my internet explorer suddenly quits. It's only just started doing this. I have an ibook with version 5.1. Hope you can help. Thanks.

thanks for message

witeshark said:

Have you deleted history and emptied cache?

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Hi No, i've not done anything. I'm not sure how to do that.

witeshark said:

Have you deleted history and emptied cache?

Click to expand...

Hi, I have done all that but it still quits when I go to another page.

witeshark said:

Have you tried these:
repair permissions. After every software update, and about every 2 weeks: close all apps and log totally off. Log on, go in Finder, Applications. Utilities, Disk Utility. After the message -getting disk information- select volume (below the hard drive name -upper left corner). Just highlight it. Now look to the lower two things are there near the middle, verify permissions, repair permissions. Click repair permissions. Also make sure you run cron tasks Finder, Applications. Utilities Terminal type (switching to root - superuser) sudo sh /etc/daily > this needs to be done /weekly (instead of daily) and monthly. again with all apps closed.

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Thanks. I've just tried that, but the disk utility has a thing saying first aid and the repair and verify buttons are grey and so wont click, even when the hard drive name is highlighted.