changing rgba alpha transparency with jquery

Question

Possible Duplicate:
jQuery + RGBA color animations

hey,

i want to change the opacity of an rgba value on hover, but the opacity stays at .07.. maybe ou can help me find the mistake.

CSS (IE hacks are in seperate file - no need to mention them here)

.boxcaption{
   float: left;
   position: absolute;
   height: 100px;
   width: 100%;
   background: rgb(255, 144, 11);
   background: rgba(255, 144, 11, 0.7);
}

JS

var thumbslide = $('.boxgrid.captionfull').click(function() {
    $('.boxgrid.captionfull.clicked').removeClass('clicked').children('.cover').stop().animate({top: 230, background: 'rgba(255, 144, 11, 0.7)'}, 350);
    $(this).toggleClass('clicked').children('.cover').stop().animate({top: 0, height:"230px", background: 'rgba(255, 144, 11, 1)'}, 350);
});

Answer 1

I get the feeling (untested guess) that jQuery is not checking the CSS background property for rbga(...) and thus not applying a hack fix to change the filter:alpha().

I think you'll need to change opacity:1 separately.

.animate({top:0,height:"230px",background:'rgb(255, 144, 11)',opacity:1}, 350);