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resizing user images with javascript

I dont use javascript much, so I was wondering if there was a way to resize an image from a users computer, and save it as the smaller image before it uploads. I was able to figure out a way to do it with php but the user picture has to upload completely then it resizes it which take a longer time than seems neccesary.

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@felgallJul 27.2005 — Javascript only has access to the web page content, it can't access files on the users computer (except for cookies belonging to the site).
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