.boxmain{width:420px; height:350px; background:#ffffff; position:fixed; left:50%; margin-left:-210px; top:50%; margin-top:-170px;}
.boxmain form{margin:0 20px;}
.boxmain form .control-label{text-align:right; width:80px; margin-right:10px;}
.boxmain form .control-group{margin-bottom:10px;}