pre caching the second image from php script

Aug 122012

Programming in php: pre caching the second image from php script on newest questions tagged php – Stack Overflow

I have my html like this:

<html>
<body>
         <script src="http://example.com/a.js"></script>
         <img src="loading.gif" />

</body>
</html>

now I have a php script which outputs a png image.

What i want is to :

Pre-load/Pre-cache the png image from the php script.
When every thing is loaded(the page,images, external js,..) then i need
to call a function defined in a.js
after calling the function, I
need to display the preloaded image (replacing the loading.gif)

How do i achieve this? Please help

source: http://stackoverflow.com/questions/11924157/pre-caching-the-second-image-from-php-script
Programming in php: programming-in-php

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