Add admin global variable set from getContents

js/books.js

@@ -3,6 +3,7 @@ var kindlemail = "";
 var currentpath = "";
 var searchTimeout = null;
 var lastSearch = "";
+var admin = false;
 
 $(document).ready(function() {
    getContents();
@@ -65,6 +66,7 @@ function getContents() {
       dataType : 'json',
       success  : function(data, stat, jqo) {
                     if ( data.validated == false ) redirectToLogin();
+                    admin = data.admin;
                     if ( data.kindlemail != kindlemail ) {
                        kindlemail = data.kindlemail;
                        showKindleMail();