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How do I pre-load (preload) picture?
You must fill in the header of your page (<head> ...</ head>) the following code:
<script type="text/javascript"> miaImg = new Image (); miaImg.src = 'nuova_immagine.jpg'; </ Script>doing so the image will be saved in the browser cache and can be invoked with extreme speed in any dynamic operations (such as a rollover) made with Javascript.
On the topic of interest might be reading this article .
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