之前一直用并有效的CSS魔咒：
.modbox{padding:10px 10px 0 10px;background-color:#4949C8;border-left:1px solid #4949C8;border-right:1px solid #4949C8}
.modbl{background:transparent;border-left:1px solid #4949C8;border-bottom:1px solid #4949C8;line-height:1px}
.modbc{background:transparent;border-bottom:1px solid #4949C8;line-height:1px}
.modbr{background:transparent;;border-right:1px solid #4949C8;border-bottom:1px solid #4949C8;line-height:1px}
.modbox,.modbl,.modbc,.modbr{filter:alpha(opacity=60);-moz-opacity:0.8;width:auto !important;width:100%}
现在用了突然变得无效了...请教高人指点....如何让空间里的板块变半透明？