the images, rather than being updated when I click the submit button in my form, are only being updated when I hit the refresh button

You haven't shown your form, in particular what action URI it submits to, and how you're handling the respective request on the server side. Also, under some circumstances, it could make a difference whether you use the HTTP method GET or POST.

First step would be to look in the webserver's access log to see if the request is actually coming in and what the server's HTTP response code is...

Update: or is your problem rather that you modify the images' content, but try to serve them under the same name/URI?  In that case, appending some dummy parameter to the image URIs, which changes from request to request (e.g. the current time) 

  $image_web_path.'imagefile6.gif?t='.time()

[download]

could get you around unwanted caching...

In reply to Re: Web server cache-ing? by almut
in thread Web server cache-ing? by campbell

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