网页部分：
<DIV class=banner_r><A class=b1 href="kjjj.html">按钮一</A> <A class=b2 href="kcxf.html">按钮二</A> <A class=b3 href="kcxf.html">按钮三</A> </DIV>
CSS部分
.banner_r {
WIDTH: 240px; FLOAT: left
}
.banner_r A {
MARGIN-TOP: 1px; TEXT-INDENT: -99999em; WIDTH: 240px; DISPLAY: block; HEIGHT: 99px
}
.b1 {
MARGIN-TOP: 0px; BACKGROUND: url(images/b_r.jpg)
}
.b1:visited {
MARGIN-TOP: 0px; BACKGROUND: url(images/b_r.jpg)
}
.b1:hover {
BACKGROUND: url(images/b_r.jpg) 240px 0px
}
.b2 {
BACKGROUND: url(images/b_r.jpg) 0px 200px
}
.b2:visited {
BACKGROUND: url(images/b_r.jpg) 0px 200px
}
.b2:hover {
BACKGROUND: url(images/b_r.jpg) 240px 200px
}
.b3 {
BACKGROUND: url(images/b_r.jpg) 0px 100px
}
.b3:visited {
BACKGROUND: url(images/b_r.jpg) 0px 100px
}
.b3:hover {
BACKGROUND: url(images/b_r.jpg) 240px 100px
}
