body
	   {
	   width:760px;
	   margin:auto;
	   font-family: Arial;
	   }
	   
	   .copyright
	   {
	    
	    text-align: center;
        font-family: Arial;
        text-decoration: underline;
        color: green;
	   }
	   
	   #entrez{
	   width:200px;
	   height:53px;
	   }
	   
	   
	   
	   a.B { background-image: url(images/btn_entrez.jpg); display: block; width: 200px; height:53px; } 
       a.B:hover { background-image: url(images/btn_entrez_2.jpg); }