html, body { 
    margin:0px;
    padding:0px;
    height:100%;
    margin-left: 0px;
    margin-bottom: 0px;
    margin-top:0px;
    background-image: url(http://www.rolfwalser.ch/cms/main_images/bg_side_01.jpg);
    background-color: #ffffff;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    font-size: 10px;
    color: #58585a;
    line-height:1.5;
    text-decoration: none;}
<!--
 
a, a:link, a:visited, a:active{
 font-family: Verdana, Arial, Helvetica, sans-serif; 
 font-size: 11px;
 color:#234869;font-weight:bold;
text-decoration: none;}

a, a:hover {
  color:#df0001;
font-size: 11px;
text-decoration: none;}

.tablemiddle {
    margin: 0; 
    padding: 0;
    height:1500px;
    margin-left:0px;
    margin-bottom:0px;
    margin-right:opx;
    margin-top:0px; 
    }

 h1 {
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size:11pt;
 color:#58585a;
 font-weight:bold;
}
 h2 {
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size:10pt;
 color:#00A2FF;
 font-weight:bold;
}
 h3 {
 font-family: Verdana, Arial, Helvetica, sans-serif;
 font-size:9pt;
 color:#000000;
 font-weight:bold;
}
                
.navi {
    color:#ffffff;
    font-size: 11px;
    line-height:0.8;
    text-decoration: none;}

.content {
margin: 0; 
padding: 0; 
width: 100%; 
height: 100%; 
    }