.botao0 { 
   top:0px;
   left:0px;
   margin:0px;
   padding:0px; 
} 

.botao0 a { 
   background-image: url('images/assinar.png'); 
   color: #0066ff; 
   text-decoration: none; 
   display: block; 
   width:200px;  
   height:30px;
   font-family:verdana;
   font-size:9px
} 

.botao0 a:hover { 
   background-image: url('images/assinar2.png'); 
   color: #ff9900;
   text-decoration: underline 
}