带下拉子菜单的导航菜单

a { display: block; float:left; margin:5px; height: 37px;line-height: 37px; text-align: center; background: url(/upload/2010-08/17/091722_btn_bg.gif) no-repeat 0px 0px; color: #d84700; font-size: 14px; font-weight: bold; text-decoration: none; padding-left:18px; }

a span { display:block; background: url(/upload/2010-08/17/091722_btn_bg.gif) no-repeat right 0px; padding-right:20px;}

a:hover { background: url(/upload/2010-08/17/091722_btn_bg.gif) no-repeat 0px -37px;}

a:hover span{ background: url(/upload/2010-08/17/091722_btn_bg.gif) no-repeat right -37px;}