修改判题设置；增加web 和 mongodb 数据库的操作

static/src/js/app/oj/problem/problem.js

@@ -1,8 +1,9 @@
 require(["jquery", "code_mirror"], function ($, code_mirror) {
     var code_editor = code_mirror($("#code-editor")[0], "text/x-csrc");
+    var language = "1";
 
     $("#language-selector").change(function () {
-        var language = $("#language-selector").val();
+        language = $("#language-selector").val();
         var language_types = {c: "text/x-csrc", cpp: "text/x-c++src", java: "text/x-java"};
         code_editor.setOption("mode", language_types[language]);
     });
@@ -19,6 +20,9 @@ require(["jquery", "code_mirror"], function ($, code_mirror) {
 
     $("#submit-code-button").click(function () {
         show_loading();
+        $.ajax({
+
+        });
         setTimeout(
             function () {
                 $("#a").animate({opacity: '1'})