update sale item xls

app/views/origami/payments/show.html.erb

@@ -379,21 +379,21 @@
       return false;
     });
 
-    $('#pay').click(function() {
+    $('#pay').click(function(event) {
       // $('#pay').text("Processing, Please wait!")
-
-      $( "#loading_wrapper" ).show();
+      $( "#loading_wrapper").show();
 
       if($('#balance').text() > 0){
         swal ( "Oops" ,  "Insufficient Amount!" ,  "error" );
-        $( "#loading_wrapper" ).hide();
+        $( "#loading_wrapper").hide();
       }else{
+        $(this).off("click");
         var sale_id   = $('#sale_id').text();
         var item_row  = $('.is_card');
         if (item_row.length < 1) {
           calculate_member_discount(sale_id);
         }
-
+        
           //  payment
           var cash = $('#cash').text();
           var credit = $('#credit').text();