check user agent and token when webview is loaded

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

@@ -257,6 +257,9 @@
 var cashier_type = "<%= @cashier_type %>";
 	$(document).ready(function(){
     	setHeaderBreadCrumb(_DISCOUNTS_);
+    	/* check webview loaded*/
+		var webview = <%= @webview %>;
+		showHideNavbar(webview);
 
 		$('#back').on('click',function(){
 		    var id       = $("#table_id").text();