#dark_bg {
position:fixed;
opacity: 0.6;
-moz-opacity: 0.6;
filter:alpha(opacity=60);
background-color:#000;
z-index:1;
height:100%;
width:100%;
left:0px;
top:0px;
cursor:pointer;
}

#bilderbox {
position:fixed;
left:50%;
top:50%;
background-color:#ffffff;
z-index:2;
text-align:center;
padding:5px;
}

#currentpic {
position:relative;
z-index:3;
}

#blbox {
position:absolute;
z-index:4;
top:0px;
left:0px;
height:100%;
width:50%;
cursor:pointer;
background-image:url(http://sfg-singen.de/template_markus/nothing.png);
}

#brbox {
position:absolute;
z-index:4;
top:0px;
right:0px;
height:100%;
width:50%;
cursor:pointer;
background-image:url(http://sfg-singen.de/template_markus/nothing.png);
}

#blsign {
position:absolute;
z-index:5;
top:50px;
left:0px;
display:none;
cursor:pointer;
}

#brsign {
position:absolute;
z-index:5;
top:50px;
right:0px;
display:none;
cursor:pointer;
}