.zweibilder { width:700px; margin-top:30px; text-align:center; }
.zweibilder img { padding:0 50px 0 50px; vertical-align:middle; }

.bildlinks .bildbox130 { width:130px; float:left; }
.bildlinks .bildboxl { width:200px; float:left; text-align:left; }
.bildlinks .bildboxr { width:200px; float:right; text-align:right; }

.ybbaum a { display:block; width:100px; height:100px; background:transparent url(../bilder/i1_ybbaum.jpg) no-repeat; }
.ybbaum a:hover { background-position:0 -100px; }
.ybbaum a span { display:none; }
.yblotus a { display:block; width:100px; height:100px; background:transparent url(../bilder/i1_yblotus.jpg) no-repeat; }
.yblotus a:hover { background-position:0 -100px; }
.yblotus a span { display:none; }
.ybboot a { display:block; width:100px; height:100px; background:transparent url(../bilder/i1_ybboot.jpg) no-repeat; }
.ybboot a:hover { background-position:0 -100px; }
.ybboot a span { display:none; }
.ybheld a { display:block; width:100px; height:100px; background:transparent url(../bilder/i1_ybheld.jpg) no-repeat; }
.ybheld a:hover { background-position:0 -100px; }
.ybheld a span { display:none; }