round corner box with alpha
.header {          color:#fff;          background:#000;          width:35px;          height:60px;          text-align:center;          font-size:0.7em;          padding:3px 0 0 0;          opacity: 0.5;filter:alpha(opacity=50);zoom:1;          -webkit-border-top-left-radius:5px;          -webkit-border-top-right-radius:0px;          -webkit-border-bottom-left-radius:5px;          -webkit-border-bottom-right-radius:0px;          -khtml-border-radius-topleft:5px;          -khtml-border-radius-topright:0px;          -khtml-border-radius-bottomleft:5px;          -khtml-border-radius-bottomright:0px;          -moz-border-radius-topleft:5px;          -moz-border-radius-topright:0px;          -moz-border-radius-bottomleft:5px;          -moz-border-radius-bottomright:0px; } use this css for round corner with .5 opacity.
