角丸半透明のdivを作る

div#header-info-kadomaru{
border-radius: 20px;         /* CSS3 */
-moz-border-radius: 20px;    /* Firefox */
-webkit-border-radius: 20px; /* Safari,Chrome */
background-color: #696969;
filter: alpha(opacity=20); /* IE */
opacity: 0.2; /* Chrome, Firefox, Safari, Opera, */
padding: 20px;
}