body {
margin: 0 auto;
width: 900px;
background-image: url(../pic/interdocom.jpg);
background-position:  center 0px;
background-repeat : no-repeat;
}
#kopf {
height: 200px;
margin-top: 0px;
}
#haupt {
position: absolute;
height: 500px;
margin-left: 150px;
}

#navigation {
float: left;
}

#navigation a:link{
background-image: url(../pic/button/button-1.png);
color: black;
text-align: center;
height: 23px;
width: 100px;
display: block;
line-height: 1.5;
text-decoration: none;
font-weight: bold;
border-bottom: 1px solid white; 
}

#navigation a:visited{
background-image: url(../pic/button/button-1.png);
color: black;
text-align: center;
height: 23px;
width: 100px;
display: block;
line-height: 1.5;
text-decoration: none;
font-weight: bold;
border-bottom: 1px solid white; 
}

#navigation a:hover{
background-image: url(../pic/button/button-2.png);
color: black;
text-align: center;
height: 23px;
width: 100px;
display: block;
line-height: 1.5;
text-decoration: none;
font-weight: bold;
border-bottom: 1px solid white; 
}

#inhalt {
padding-left: 15px;
padding-top: 15px;
padding-right: 15px;
width: 750px;
height: 450px;
overflow: auto;
}



a:link {
color: black;
}

a:visited {
color: black;
}