diff --git a/app/views/users/user_resource.html.erb b/app/views/users/user_resource.html.erb
index f6bb3c8cb..5c6339e59 100644
--- a/app/views/users/user_resource.html.erb
+++ b/app/views/users/user_resource.html.erb
@@ -145,6 +145,7 @@
     var id; //资源id
     var sendType;  //发送到课程 1  发送到项目 2
     var lastSendType;  //保存上次发送的发送类型
+    var last_op
     $("#resources_list").mousedown(function(e) {
         //如果是右键的话
         if (3 == e.which) {
@@ -179,6 +180,28 @@
             last_line = line;
         }
     });
+
+    //鼠标经过时，背景颜色设为灰色
+    $("#resources_list").mouseover(function(e){
+        pageX = e.clientX;
+        pageY = e.clientY;
+        var ele = document.elementFromPoint(pageX,pageY);
+        line = $(ele).parent();
+        if(last_op != null){
+            last_op.children().css("background-color", 'white');
+            restore();
+            last_op == null;
+        }
+        //如果当前的tag是li，那么还要li的父级元素
+        if(line.get(0).tagName === 'LI'){
+            line = line.parent();
+        }
+        //将当前的元素的所有子元素的背景色改为蓝色
+        line.children().css("background-color", '#e1e1e1');
+        //将当前元素赋给 上一个对象 保存起来。
+        last_op = line;
+    });
+
     //元素包含关系计算
     var contains  = function(root, el) {
         if (root.compareDocumentPosition)