diff -r 000000000000 -r bca7a7e058a3 src/pyams_skin/resources/js/myams-jsonrpc.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_skin/resources/js/myams-jsonrpc.js	Thu Feb 13 11:43:31 2020 +0100
@@ -0,0 +1,124 @@
+/**
+ * MyAMS JSON-RPC features
+ */
+(function($, globals) {
+
+	var ams = globals.MyAMS;
+
+	ams.jsonrpc = {
+
+		/**
+		 * Get address relative to current page
+		 */
+		getAddr: function(addr) {
+			var href = addr || $('HTML HEAD BASE').attr('href') || window.location.href;
+			var target = href.replace(/\+\+skin\+\+\w+\//, '');
+			return target.substr(0, target.lastIndexOf("/") + 1);
+		},
+
+		/**
+		 * Execute JSON-RPC request on given method
+		 *
+		 * Query can be given as a simple "query" string or as an object containing all query parameters.
+		 * Parameters:
+		 *  - @query: query string (posted as "query" parameter) or object containing all parameters
+		 *  - @method: name of JSON-RPC procedure to call
+		 *  - @options: additional JSON-RPC procedure parameters
+		 *  - @callback: name of a callback which will be called on server response
+		 */
+		query: function(query, method, options, callback) {
+			ams.ajax && ams.ajax.check($.jsonRPC,
+									   ams.baseURL + 'ext/jquery-jsonrpc' + ams.devext + '.js',
+									   function() {
+										   if (typeof (options) === 'function') {
+											   callback = options;
+											   options = {};
+										   } else if (!options) {
+											   options = {};
+										   }
+										   if (callback === 'undefined') {
+											   callback = options.callback;
+										   }
+										   if (typeof (callback) === 'string') {
+											   callback = ams.getFunctionByName(callback);
+										   }
+										   delete options.callback;
+
+										   var params = {};
+										   if (typeof (query) === 'string') {
+											   params.query = query;
+										   } else if (typeof (query) === 'object') {
+											   $.extend(params, query);
+										   }
+										   $.extend(params, options);
+
+										   var result;
+										   var defaults = {
+											   id: new Date().getTime(),
+											   params: params,
+											   success: callback || function(data) {
+												   result = data;
+											   },
+											   error: ams.error && ams.error.show
+										   };
+										   var settings = $.extend({}, defaults, options);
+										   $.jsonRPC.withOptions({
+																	 endPoint: ams.jsonrpc.getAddr(options.url),
+																	 namespace: options.namespace,
+																	 cache: false
+																 }, function() {
+											   $.jsonRPC.request(method, settings);
+										   });
+										   return result;
+									   });
+		},
+
+		/**
+		 * Execute given JSON-RPC post on given method
+		 *
+		 * Parameters:
+		 *  - @method: name of JSON-RPC procedure to call
+		 *  - @options: additional JSON-RPC method call parameters
+		 *  - @callback: name of a callback which will be called on server response
+		 */
+		post: function(method, data, options, callback) {
+			ams.ajax && ams.ajax.check($.jsonRPC,
+									   ams.baseURL + 'ext/jquery-jsonrpc' + ams.devext + '.js',
+									   function() {
+										   if (typeof (options) === 'function') {
+											   callback = options;
+											   options = {};
+										   } else if (!options) {
+											   options = {};
+										   }
+										   if (typeof (callback) === 'undefined') {
+											   callback = options.callback;
+										   }
+										   if (typeof (callback) === 'string') {
+											   callback = ams.getFunctionByName(callback);
+										   }
+										   delete options.callback;
+
+										   var result;
+										   var defaults = {
+											   id: new Date().getTime(),
+											   params: data,
+											   success: callback || function(data) {
+												   result = data;
+											   },
+											   error: ams.error && ams.error.show
+										   };
+										   var settings = $.extend({}, defaults, options);
+										   $.jsonRPC.withOptions({
+																	 endPoint: ams.jsonrpc.getAddr(options.url),
+																	 namespace: options.namespace,
+																	 cache: false
+																 }, function() {
+											   $.jsonRPC.request(method, settings);
+										   });
+										   return result;
+									   });
+		}
+	};
+
+})(jQuery, this);