新建试卷时，在试卷标题处按回车试卷信息就保存了

app/views/exercise/_new_head.html.erb

@@ -14,4 +14,22 @@
     <p class="fr">
       <a href="javascript:void(0)" onclick="ex_head_submit($(this));" class="fr task-btn mr15 task-btn-orange">保存</a>
     </p>
-<% end %>
+<% end %>
+<script>
+    $(function(){
+        $("#exercise_head_edit").on("keydown", "input[name='exercise[exercise_name]']", function(event){
+            var code;
+            if (!event) {
+                event = window.event; //针对ie浏览器
+                code = event.keyCode;
+            }
+            else {
+                code = event.keyCode;
+            }
+            if(code == 13) {
+                event.preventDefault();
+                return false;
+            }
+        });
+    });
+</script>