[TYPO3-core] FYI: Fixed bug #7852: JS error raised in IE7 when closing htmlArea RTE

[Stanislas Rolland]

FYI: The attached SVN patch was committed.

Type:
Bugfix

Problem:
When some popup windows were opened and closed by clicking on the top 
right corner or closed by escaping, IE7 may raise a Javascript error 
when unloading the RTE.

Solution:
Catch the error(s) as some objects apparently still exist but are not 
usable anymore according to IE, and anyways we're off.

Bugtracker references:
http://bugs.typo3.org/view.php?id=7852

Branches:
TYPO3_4-2

Regards,
Stanislas
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