#bilder_1 {
 z-index:6;
 top:80px;
 left:0px;
 height:177px;
 width:177px;
 background-image:url("../images/gallery/treffen/2005_ho_1.png");
 background-repeat:no-repeat;
}

a:hover#bilder_1 {
 background-image:url("../images/gallery/treffen/2005_ho_1_over.png");
}

#bilder_2 {
 z-index:5;
 position:absolute;
 top:40px;
 left:150px;
 height:207px;
 width:206px;
 background-image:url("../images/gallery/treffen/2005_ho_2.png");
 background-repeat:no-repeat;
}

a:hover#bilder_2 {
 background-image:url("../images/gallery/treffen/2005_ho_2_over.png");
}

#bilder_3 {
 z-index:4;
 position:absolute;
 top:30px;
 left:330px;
 height:176px;
 width:175px;
 background-image:url("../images/gallery/treffen/2005_ho_3.png");
 background-repeat:no-repeat;
}

a:hover#bilder_3 {
 background-image:url("../images/gallery/treffen/2005_ho_3_over.png");
}

#bilder_4 {
 z-index:3;
 position:absolute;
 top:90px;
 left:475px;
 height:177px;
 width:175px;
 background-image:url("../images/gallery/treffen/2005_ho_4.png");
 background-repeat:no-repeat;
}

a:hover#bilder_4 {
 background-image:url("../images/gallery/treffen/2005_ho_4_over.png");
}