#dhtmltooltip{
position: absolute;
left: -1000px;
width: 350px;
border: 1px solid black;
padding: 2px;
background-color: lightyellow;
visibility: hidden;
z-index: 220; 
/*Remove below line to remove shadow. Below line should always appear last within this CSS*/
filter: progid:DXImageTransform.Microsoft.Shadow(color=silver,direction=135);
}

#dhtmlpointer{
position:absolute;
left: -1000px;
z-index: 305;
visibility: hidden;
}
 
#btnCerrar{
position:absolute;
left: 0px;
top: -1000px;
z-index: 300; 
visibility: hidden;
}