body {
 background:white url(http://www.juanderboy.com/anes/pics/bgnavegacion.jpg) top no-repeat;
  margin:0;
  padding:0;
  font-family:arial;
  font-size:20px;
}

a:link {color:blue;}
a:visited {color:blue;}
a:hover {color:red;}
a:active {color:grey;}
.tablalinks a:link{color:white;}
.tablalinks a:visited{color:white;}
.tablalinks a:hover{color:white;}
.tablalinks a:active{color:white;}
  
#maincontainer {
  margin:auto;     
  height:600px;
  width:870px;
}

#maincontent{
  width:870px;
  position:center;
}

#header{
  height:109px;
  position: relative;
}

#mainmenu{
  height:39px;
  width:870px;
  position:absolute;
  bottom:0px;
  padding-left:0px;
}

.barrauno{
  height:31px;
  margin:0px;
  position:relative;
  color:black;
  text-align:left;
  padding:px;
}

.barrados{
  height:64px;
  margin:0px;
  position:relative;
  color:black;
  text-align:left;
  padding:px;
}

.barradtres{
  height:40px;
  margin:0px;
  position:relative;
  color:black;
  text-align:left;
  padding:px;
}