Sometimes we need to JavaScript preload images on the web pages for some predicted purposes. And this post is a should-stop to read, because this post provides you 4 simple solutions to preload necessary images on your web pages using CSS, preload images with jQuery and JavaScript, Mootools preload images. All solutions are very simple to implement, please go to the full-post page for detailed instructions and JavaScript example codes.

Check our other solutions to preload your images:
- Best Ways to Preload Image JavaScript with CSS, AJAX
- Image Preloader MKII
- Preload Image with progress bar

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If you use an image for the background image of an element on a mouseOver or :hover event(for example, navigation menu which images are used), the image will not load until the first :hover event if you only apply that background-image in the CSS for the :hover state. The preloader will help you with this! It’ll load those images when the page loads and stores them in your browsers cache. So avoid delays with rollover effects. In this article, you’ll learn 4 ways to preload images with CSS or javascript technique.

OPTION 1: Use A Little CSS(display:none;)