[PATCH] JS Form Popups

[Ralf Hoelzer]

This patch that tries to fix Bug #58650:

http://bugs.kde.org/show_bug.cgi?id=58650

 If a JavaScript form.submit() is called and the form has a non-existent 
target specified, a new browser window pops up. This trick to get around 
popup blockers is used
on http://sharereactor.com. 

The patch tries to check if a frame with the target name exists. If not, it 
either blocks it (deny/smart policy) or asks. I've put it into ecma/kjs_html 
to make sure it's only checked if the form is submitted via JS.

I tested this with a few testcases and it works for me. I wasn't sure if a 
frame is allowed to be replaced in a different frameset. That check might 
need to be added.

regards,

Ralf



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