Public news / October 2006 / Using Fewer Images
Using Fewer Images
Useful trick for optimizing your website. Use a single image by taking advantage of CSS image offsets.
10 oct at 16:25 by Nate
There are 9 guest comments so far.
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This is a effective method that I've been using for the better part of the year now. So hopefully people will realize that they can approach things like their navigation and hover effects so much easier and better. It's nice to have clean code w/o javascript to do a hover effect.
Nice, definately something I will be able to take advantage of. I hadn't previously thought of that.
The only issue when using this technique is that you get a flicker when using IE with cacheing turned off.
The solution for this (especially when using UL LI & A hrefs for navigation) is to have the image also set as the background for the element below it (e.g. on the LI as well as the A).
http://www.collylogic.com/scripts/rollover.html
By Simon Collison - I've used it for every site I've had to do since forever ago. Allows for alts, eliminates the flicker-in-IE problem as it sets it as a background image, and even allows for text-over-top without having to mess with the z-index.
pretty neat stuff for being, what, four years old now?
It's funny as old of a technique this is.. There are still tons of people out there who create two images for their hover states.
If you want to take it one step further (once again not really) Add a 3rd level to the image to allow a "active" state.
But now that I think about it could a visited state be made as well?
Phil - Sorry, but Simon Collison's example doesn't fix the IE flickering problem when cacheing is turned off.
You need to add the background a third time underneath the A to fix this problem (unless there's another way?)
long live the javascript powered rollovers!! :P
good, great
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