文本框只能填入数字

public/resource/template/setting_template_tpl.html

@@ -19,7 +19,7 @@
     <div class="form-group">
         <label class="col-sm-3 control-label" style="text-align: right">隐号绑定有效期（天数）：</label>
         <div class="col-sm-9">
-            <input type="text" class="form-control btn5" name="day_num" placeholder="隐号绑定天数" value="[%= it['day_num'] %]">
+            <input type="number" class="form-control btn5" name="day_num" placeholder="隐号绑定天数" value="[%= it['day_num'] %]">
         </div>
     </div>
 </script>