check duplicate paypar account no issue

app/views/origami/customers/index.html.erb

@@ -364,7 +364,10 @@
 <script type="text/javascript">
   var cashier_type = "<%= @cashier_type %>";
   var page     = "<%= @page %>"; 
+  var paypar_account_no = [];
   $(function() {
+    paypar_account_no = JSON.parse('<%= @paypar_accountno.to_json.html_safe %>');
+    console.log(paypar_account_no);
     /* check webview loaded*/
     var webview = <%= @webview %>;
     showHideNavbar(webview);
@@ -479,9 +482,23 @@
   // get CardNo from Java
   function setCardNo(cardNo){
     if(cardNo.length == 16){
-      $("#paypar_account_no").val(cardNo);
-      $("#search").val(cardNo);
-      $("#type").val("card")
+      if($.inArray(cardNo, paypar_account_no) !== -1){
+        $("#paypar_account_no").val(cardNo);
+        $("#search").val(cardNo);
+        $("#type").val("card");
+      }else{
+        swal({
+          title: 'Oops',
+          text: 'CardNo already registered, Please try another card!',
+          type: 'error',
+          html: true,
+          closeOnConfirm: false,
+          closeOnCancel: false,
+          allowOutsideClick: false
+        }, function () {
+          window.location.reload();
+        });
+      }
     }
   }