.Allbtn{ background:url(../images/Allbtn.gif) 0 0 no-repeat ; border:none; width:60px; height:20px; text-align:center; font-size:12px; line-height:22px; overflow:hidden; cursor:pointer; color:#fff; font-family:"宋体"; padding:0; margin:0 }
.Allbtn:hover{ background:url(../images/Allbtn.gif) 0 -20px no-repeat; color:yellow}
a.Allbtn{ height:16px;padding-top:4px; display:block; text-decoration:none}
a.Allbtn:hover{ background:url(../images/Allbtn.gif) 0 -20px no-repeat #fff; color:yellow}