diff --git a/FO/Views/Course/ApplyPay.cshtml b/FO/Views/Course/ApplyPay.cshtml
index baada28..39936ab 100644
--- a/FO/Views/Course/ApplyPay.cshtml
+++ b/FO/Views/Course/ApplyPay.cshtml
@@ -238,4 +238,13 @@
             msgadmin();
         }
     }
+
+    function checkMobile() {
+        var varUA = navigator.userAgent.toLowerCase();
+        if (varUA.indexOf('android') > -1) {
+            return "A";
+        } else if (varUA.indexOf("iphone") > -1 || varUA.indexOf("ipad") > -1 || varUA.indexOf("ipod") > -1) {
+            return "N";
+        }
+    }
 </script>