#dhtmltooltip{ position: absolute; width: 150px; border: 1px solid black; padding: 2px; background-color: white; 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); } .tthead{ text-align:center; }