去除透明PNG上的斑点，在IE中以额外的不透明度过滤

I made a rotating image fader using Javascript and CSS to show images and unload them. I wanted to use transparent PNG's, I didn't expect or care if they looked good in IE 6, but IE 7 and 8 treated them with the same disrespect. Firefox and other modern browsers looked great. I made a rotating image fader using Javascript