#principal li { 
   display:inline; 
   float:left; 
   width:120px;
   height:100px;
   background-color:#f5f7f9; 
   padding:5px; 
   margin:10px; 
   text-align: center; 
   border-right: #a5a7aa solid 1px; 
   border-bottom: #a5a7aa solid 1px; 
} 
.txtGaleria {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 12px;
	text-decoration: none;
	color: #336600;
}