Making your Tab Transparent Until Mouse Over

Place this code within the custom code tab js section of your overlay

#ju_bbox{
opacity: .7; 
filter: alpha(opacity=70);
-ms-filter: \"progid:DXImageTransform.Microsoft.Alpha(Opacity=70)\";
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=70);
}

#ju_bbox:hover{
opacity: 1; 
filter: alpha(opacity=100);
-ms-filter: \"progid:DXImageTransform.Microsoft.Alpha(Opacity=100)\";
filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
}