Test whether image loaded correctly with JavaScript

Posted by johkar on Stack Overflow See other posts from Stack Overflow or by johkar
Published on 2010-04-20T15:25:34Z Indexed on 2010/04/20 15:33 UTC
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javascript-events

I have an image deployed on several application servers (green up arrow: uparrow.gif). I have an application server status page where I list out all the servers and with a corresponding image where the image's source is the uparrow.gif for that server. If the image does not load (server down) I would like to switch to a red down arrow (downarrow.gif). Is there a way to check whether an image loaded or not with straight JavaScript (no JS libraries etc)? I would imagine I would set an interval for it to continue checking if the user were on the page. Thanks.

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