.ground{ background-color:white;visibility:hidden;display:none;position:absolute;left:0px;top:0px;}

.jyvgfylx { 
             background-color:white;
             visibility:hidden;
             display:none;
             position:absolute;
             left:0px;top:0px; 
}

.jyyksdf { 
             background-color:white;
             visibility:hidden;
             display:none;
             position:absolute;
             left:0px;top:0px; 
}