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Since firefox 1.5 I was unable to change images through javascript (even though it was enabled in the preferences window). I found this solved the problem:
In about:config change "dom.disable_image_src_set" to "false". That did it.
Hope it helps someone.
And where were all the sportsmen who always pulled you though?
They're all resting down in Cornwall
writing up their memoirs for a paper-back edition
of the Boy Scout Manual.
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