.tc{text-align: center;}
.b{border:1px solid #000}
.mh{min-height: 600px;}
.ma{margin:auto;}

.header{font-size:large;}
#footer {
   position: fixed;
   bottom: 0;
   width: 100%;   
   border-top: 1px solid #666;
}
.linkpic{
   margin-top: 100px;
   width: 33.33%;
   padding: 10px;
   text-align: center;
   float: left;
}