animate opacity png fix

Is ther a fix for the animate opacity in jQuery I've tried supersleight and many others but I get no results. The image loads fine as a png it's just when it is animated i get problems. I have also tried EpngFix iepngfix and DD_belatedPNG but they don't work. Im using ie8 on开发者_如何学Go windows 7

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in ie8 and ie6 you can use

filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src="test.png")
  alpha(opacity=50);
background: none;

jquery animate opacity will work perfectly because it simply changes filter: alpha

for ie7 see ie7 png opacity. is it possible