避免重复提交

@@ -196,10 +196,18 @@ let question = {
         }
     },
     saveAnswers: function(info) {
-        if (!info || !info.length) {
+        var that = this;
+
+        if (this.saving || !info || !info.length) {
             return;
         }
 
+        this.saving = true;
+
+        setTimeout(function() {
+            that.saving = false;
+        }, 5000);
+
         $.ajax({
             type: 'POST',
             url: '/3party/questionnaire/submit',
@@ -211,6 +219,8 @@ let question = {
                 frontAnswers: JSON.stringify(info)
             }
         }).then(function(data) {
+            that.saving = false;
+
             if (data.code === 200) {
                 tipDg.show('调查问卷已成功提交,感谢您的帮助！');