#buttonphoto, #buttonelektrik, #buttonkontakt{
position:absolute;
left: -10px;
width: 183px;
height: 51px;
}
#buttonsolar, #buttonbook, #buttonstart{
position:absolute;
left: -40px;
width: 183px;
height: 51px;
}

#buttonphoto{
top:305px;
z-index:10;
}
#buttonsolar{
top:345px;
z-index:11;
}
#buttonelektrik{
top:385px;
z-index:12;
}
#buttonkontakt{
top:465px;
z-index:14;
}
#buttonbook{
top:425px;
z-index:13;
}
#buttonstart{
top:505px;
z-index:15;
}