div.dimmer {
visibility: hidden;
position:absolute;
left:0px;
top:0px;
padding:40px;
background-color: transparent;
z-index: 9999;
}

div.dimming {
background-color: transparent;
position: absolute;
/* set z-index higher than possible */
z-index: 10000;
visibility: hidden;
border-style: none;
}

table.floatingHeader {
background-color: #000000;
font-weight: bold;
}