On Apr 10, 2010, at 9:32 AM, ChaosKnight wrote:
>
> Hi, I am still very new to Ruby on Rails, but I'm busy with my first
> RoR website, everything went well, until I realized that my images
> didn't preload... On previous websites I used a simple JavaScript
> preloader that seemed to work very well:
>
> function preloadImages() {
> if (document.images) {
> var imgFiles = preloadImages.arguments;
> var preloadArray = new Array();
> for (var i=0; i < imgFiles.length; i++) {
> preloadArray[i] = new Image;
> preloadArray[i].src = imgFiles[i];
> }
> }
> }
>
> And I called it from within the HTML:
>
> <body onload="preloadImages('/images/home.png',....etc....)
>
> This is how I called the image rollover in the Rails code:
> <%= link_to(image_tag('home.png', :mouseover=>"home_ro.png"), '/',
> {:controller=>'home', :action=>'index'}) %>
>
> Can anyone please tell me why this didn't work? I also heard that
> Prototype has it's own built-in image preloader, is this true?
>
> Thanks I really appreciate your help!
You'll want to take the onload out of the body tag and do something like this
in your application.js file:
document.observe("dom:loaded", function()
{
preloadImages('/images/home.png',....etc....);
}
);
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