diff --git a/public/stylesheets/courses.css b/public/stylesheets/courses.css
index c25821b80..be0e4de71 100644
--- a/public/stylesheets/courses.css
+++ b/public/stylesheets/courses.css
@@ -654,8 +654,8 @@ a.down_btn{ border:1px solid #CCC; color:#999; padding:0px 5px; font-size:12px;
 a:hover.down_btn{ background:#14ad5a; color:#fff; border:1px solid #14ad5a;}
 .fr{ float:right;}
 .li_min_search{ float:right; margin-right:-10px;}
-.info_ni_download{ width:100px; padding:5px;position: fixed;display:none;-moz-border-radius:3px;  -webkit-border-radius:3px;  border-radius:3px; box-shadow:0px 0px 5px #194a81; color:#666; background:#fff; text-align:left;margin-left: 200px;margin-top: 10px;}
-.info_ni{ width:100px; padding:5px;position: fixed;display:none;-moz-border-radius:3px;  -webkit-border-radius:3px;  border-radius:3px; box-shadow:0px 0px 5px #194a81; color:#666; background:#fff; text-align:left;margin-left: 50px;margin-top: -5px;}
+.info_ni_download{ width:100px; padding:5px;position: absolute;display:none;-moz-border-radius:3px;  -webkit-border-radius:3px;  border-radius:3px; box-shadow:0px 0px 5px #194a81; color:#666; background:#fff; text-align:left;margin-left: 200px;margin-top: 10px;}
+.info_ni{ width:100px; padding:5px;position: absolute;display:none;-moz-border-radius:3px;  -webkit-border-radius:3px;  border-radius:3px; box-shadow:0px 0px 5px #194a81; color:#666; background:#fff; text-align:left;margin-left: 50px;margin-top: -5px;}
 /*返回顶部*/
 .to_top{width: 19px;height: 74px;position: fixed;top: 50px;right: 1px;color: white;background: #15bccf; line-height: 1.2; padding-top: 10px;padding-left: 5px;font-size: 14px;cursor: pointer;}
 .hwork_num_ab{ width:120px;  display:block; overflow:hidden; white-space: nowrap; text-overflow:ellipsis;min-height: 1px;}