ie6下 png作为前景和背景透明

前景图片时,用js

?
?作为背景时ie下用css解决：
  background: url("../../booking/images/logo_bg.png")     _background-image:url(../../booking/images/logo_bg.png);   _background: none transparent scroll repeat 0% 0%; _FILTER:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='../../booking/images/logo_bg.png',sizingMethod='scale');
?