#bn {
	width: 157px;
	width: 157px; /* for WIN IE6*/
	background: url(../images/isbn.png) no-repeat;
	position: relative;
	height: 240px;
	margin: 0px;
	padding: 0px;
}

#bn ul {
 list-style: none;
}
#bn li {
 position: absolute;
 height: 240px;
 text-indent: -9999px;
}
#bn li a { display: block;  height: 60px;}

#bn li#bn1        { top: 0; left: 0px;	width: 157px;}
#bn li#bn2   { top: 60px; left: 0px;	width: 157px;}
#bn li#bn3        { top: 120px; left: 0px;	width: 157px;}
#bn li#bn4        { top: 180px; left: 0px;	width: 157px;}


#bn li#bn1   a:hover      { background: url(../images/isbn_on.png) 0 0; }
#bn li#bn2   a:hover { background: url(../images/isbn_on.png) 0 -60px; }
#bn li#bn3    a:hover     { background: url(../images/isbn_on.png) 0 -120px; }
#bn li#bn4    a:hover     { background: url(../images/isbn_on.png) 0 -180px; }

#bn li#bn1   a.stay      { background: url(../images/isbn_r2_c1.jpg) 0 0; }
#bn li#bn2   a.stay { background: url(../images/isbn_on.png) -60px 0; }
#bn li#bn3    a.stay     { background: url(../images/isbn_on.png) -120px 0; }
#bn li#bn4    a.stay     { background: url(../images/isbn_on.png) -180px 0; }