fix bug

apps/exams/Tpl/default/Index/examsroom_w3g.html

@@ -282,7 +282,7 @@
 
     var isCollect = "{$paper['iscollect']}" > 0 ? 1 : 0;
 
-    var limit = "{$limit}";
+    var limit = parseInt("{$limit}");
 
     function changeCollect() {
         if (isCollect) {

apps/exams/_static/js/public_exam_3g.js

@@ -58,7 +58,7 @@ $(function() {
             var question_num = parseInt($(this).data("question_num")) + 1;
         }
 
-        if (limit > 0 && question_num > limit) {
+        if (limit > 0 && question_num >= limit) {
             $(this).text('去支付');
         }