.captcah_box { position: relative; margin-top: 12px; border: 1px solid #ccc; }
.captcah_box .captcah_img { display: block; margin-right: 200px; width: auto;}
.captcah_refresh, .captcah_change {display:block;  position: absolute; right:0; padding-left: 45px; width: 200px; height:45px; line-height: 44px; text-align: left;}
.captcah_refresh { top:0; height:44px; border-bottom: 1px solid #ccc;  background:url("../images/bg_refresh.png") no-repeat 23px 50%; }
.captcah_change { top:45px; background:url("../images/bg_revoice.png") no-repeat 23px 50%; }
.captcah_change.img {  background:url("../images/bg_reimg.png") no-repeat 23px 50%;  }