Make an image transparent in IE to show non-transparent background

Posted by Select0r on Stack Overflow See other posts from Stack Overflow or by Select0r
Published on 2010-04-08T10:33:23Z Indexed on 2010/04/08 10:53 UTC
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Hi,

I'm trying to get this thing to work in IE (any version - works in FF, Opera, Safari, Chrome ...):

I have a DIV with a background-image. The DIV also contains an image that should be transparent onMouseOver. The expected behaviour now is that the DIV-background would shine through the transparent image (which it does in all browsers but IE).
Instead it looks like the image is getting transparent but on a white background, I can't see the DIV's background through the image.

Here's some code:

<div><a href="#" class"dragItem"><img /></a></div>

And some CSS:

  .dojoDndItemOver {
    cursor         : pointer;
    filter         : alpha(opacity = 50);
    opacity        : 0.5;
    -moz-opacity   : 0.5;
    -khtml-opacity : 0.5;
  }
  .dragItem:hover {
    filter         : alpha(opacity = 30);
    opacity        : 0.3;
    -moz-opacity   : 0.3;
    -khtml-opacity : 0.3;
    background     : none;
  }

All of this is embedded in a Dojo Drag-n-Drop-system, so dojoDndItemOver will automatically be set to the DIV on MouseOver, dragItem is set to the href around the image (using the same class on the image directly doesn't work at all as IE doesn't support "hover" on other items that href).

Any ideas? Or is it an IE-speciality to just "simulate" transparency on images by somehow just greying them out instead of providing real transparency and showing whatever is beneath?

Developer IT