.fr{ float:right}
.fl{ float:left}
.mb10{ margin-bottom:10px;}
.mb20{ margin-bottom:20px;}
.mt20{ margin-top:20px;}
.w200{ width:200px;}
.w160{ width:160px;}
.ml10{ margin-left:10px;}
.mr0{ margin-right:0px;}
.fb {font-weight:bold;}
.fblock{ color:#000}
.tc {text-align:center}