Animate opacity doesn't work properly on IE

Question

I\'m trying to use animate() to change the height and opacity of a div. The div has an image background in CSS. It works fine on Firefox and Safari

Answer 1

I solved it with adding an opaque background to the animated element:

CSS:

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 195px;
    height: 274px;
    cursor: pointer;
    background: #fff url('../images/common/image_hover.png') 0 0 no-repeat; /* the solution */
    opacity: 0;
    -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=0)"; /* IE8 */
    filter: alpha(opacity=0); /* IE6-7 */     
    zoom: 1;
}

JS:

$('.overlay').hover(
    function(){
        $(this).animate({'opacity': 0.7}, 300);
    },
    function(){
        $(this).animate({'opacity': 0}, 250);
    }
);

Works for IE7-8

Hope this will help someone ;)