Imagemap rollover | In usability we trust
I started of with a regular imagemap. (Some code is removed for brevity). I use a map over Scandinavia as the the image for the imagemap.
<div id="map">Here are the images that I use as backgrounds on the elements I position over the map. (Well actually these are smaller version of the once I use)
#sweden { This should do it one should think. But here’s where strange things starts to happen. The highlighted image flickers constantly as if the mouseOver and mouseOut events are triggered over and over again. Watch it in action . Solution to the flicker problemAfter some experimenting I came up with a solution where I use a transparent image as an overlay on the map image. I then assign the imagemap to the transparent image and voilà, the problem is solved.
<img src="img/transp.gif" id="transparent_map" alt="" usemap="#scandinavia_map" /> turned off, the list is visible and even though the map isn’t clickable you can click the links in the list. With Javascript turned off, the different parts of the map doesn’t highlight but they are still clickable.For those who uses the keyboard to navigate, it’s still usable, but I haven’t been able to find a way to highlight an area when it’s “active”. If anyone has an idea of how to do this, please tell me.
I found one other weakness and a more serious that is. If you browse with images turned off and CSS
Hi Gabriel,
Just a note to say this is great! I’m working on something very similar at the moment. I’d also been trying to preserve an accessible version using s, but s do the job and are probably more semantic. The image map I’m working is pretty big so I’m going try to also use a background sprite to cut down on the load time – ALA stylee ( http://www.alistapart.com/articles/sprites/ ) Will let you know how I get on combining these ideas!
R:)
You should be able to add keyboard support fairly easily. Add two new events, onfocus and onblur, and use the mouseover code for onfocus and the mouseout code for onblur. I haven’t tested this, but barring some odd behavior due to the image map, it should work. I haven’t used an image map in YEARS but I’m contemplating using one for an upcoming project, so thanks for the demo!
Hello again,
Funnily enough, I’m working on another map and remembered this post and looked back at my old project. Then I thought, it would suit this new project more if it was in jQuery… Thought I’d check back here and share my thoughts on a jQuery re-write, BUT you beat me to it! Thought, I’d add some transitions (esp as it’s so easy in jQuery), again you’re already there!! I realise this is a bit of a pointless comment, just seems we were on the same wave length. Good work, mister!
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