.drop_btn{position:relative;font-size:1.4em;font-weight:normal;padding-bottom:10px;margin-bottom:10px;color:#555;border-bottom:1px solid #ddd;word-break:break-word;word-wrap:break-word}
.drop_btn:before{display:none;position:absolute;content:'';width:24px;height:24px;left:5px;bottom:10px;background-image:url(../img/layout/oka_icon_gray.gif);background-size:600% 200%;background-position:60% 0;*content:none;*visibility:hidden}
.drop_btn.active:before{background-position:0 0}