#eins_u{visibility:hidden}
#zwei_o,#drei_o,#vier_o,#fuenf_o,#sechs_o,#sieben_o,#acht_o,#neun_o{visibility:hidden}

#content {
position:absolute;
left:auto;
right:auto;
top:15px;
bottom:100px;
overflow:hidden;
overflow-y:hidden;
background-color:#CCCCCC;
text-align:center;
margin-left:0px;
margin-right:0px;
padding:0px;
} 

#footer {
position:absolute;
width:100%;
bottom: 0;
height:60px;
text-align:center;
}