Merge branch 'szzh' into dev_hjq

public/javascripts/course.js

@@ -470,7 +470,15 @@ $(function(){
 //老师提交 新建/修改 作业
 function submit_homework(id)
 {
-    if(regex_homework_name()&&regex_evaluation_num())
+    if(!regex_homework_name())
+    {
+        $("#homework_name").focus();
+    }
+    else if(!regex_evaluation_num())
+    {
+        $("#evaluation_num").focus();
+    }
+    else
     {
         homework_description_editor.sync();
         $("#"+id).submit();