body { background: url('/Content/Images/transparent_pixel.gif') fixed; height: 100%; }



.popup_layer_base { z-index:-1;position:absolute;width:100%;left:0;top:0;height:2000px; } 

.popup_base { position:absolute;top:50%;left:50%;width:500px;margin-left:-250px;padding:10px; }


.tooltip_layer_base { z-index:-1;position:absolute; width:100%; left:0; top:0; }