#dhtmltooltip {
    position: absolute;
    width: 150px;
    border: 2px solid black;
    padding: 2px;
    background-color: lightyellow;
    visibility: hidden;
    z-index: 100;
    /*Remove below line to remove shadow. Below line should always appear last within this CSS*/
    filter: progid:DXImageTransform.Microsoft.Shadow(color=gray,direction=135);
}