body{
  background-color:#000000;
  height: 100%;
  margin-top: 0px;
  margin-bottom: 0px;
  margin-left: auto;
  margin-right: auto;
  text-align:center;
 }

 table.tu_back{
  height: 100%;
  text-align:center;
  width: 768px;
  margin-left: auto;
  margin-right:auto;
  margin-top: 0px;
  margin-bottom: 0px;
  background-image: url("images/sc_tu_background.jpg");
  background-repeat: no-repeat;
}

td.navigation{
 width: 120px;
 height: 98%;
 padding-left:15px;
 padding-top:55px;
 text-align: center;
}

td.content{
 height: 98%;
 padding-left:15px;
 padding-top:30px;
 text-align:center;
}
td{
 text-align:left;
}

div.nav_element{
 margin-top:10px;
}

div.nav_element:hover{
 margin-top:10px;
}

a.nav_element{
 text-decoration:none;
 font-weight:bold;
 color: #003300;
 cursor: pointer;
}

a.nav_element:hover{
 text-decoration:none;
 font-weight:bold;
 color: #ffff00;
 cursor: pointer;
}

a{
 margin-top:10px;
 color: #003300;
 cursor: pointer;
}

a:hover{
 margin-top:10px;
 color: #ffff00;
 cursor: pointer;
}
td.section_header{
 text-align:center;
 color:#0000ff;
 font-weight:bold;
 padding-top:20px;
}