can I target only background opacity and nothing else

nghia.code

New Member
I'm wondering if the following can be done.Looking at this example http://jsfiddle.net/huhu/r7kSf/, can only the left icons be targeted with an opacity level? To have let's say \[code\]opacity:0.5;\[/code\] normal conditions and under hover to have full opacity? I know that when using a color is easier using an alpha coefficient, but what about only the image? The option can be to use two different icons ? load alternate version of it under hover?I don't think that is good idea since to many http requests unless in a sprite or so..thx
 
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