diff --git a/bricks/accordion.js b/bricks/accordion.js
index c54e138..5d74cb6 100644
--- a/bricks/accordion.js
+++ b/bricks/accordion.js
@@ -48,6 +48,7 @@ bricks.Accordion = class extends bricks.VBox {
 		var refresh = false;
 		var b = event.target.bricks_widget;
 		var name = b.opts.name;
+		this.select_item(b);
 		bricks.debug('accordion: button=', b, 'name=', name);
 		var pos = -1;
 		for (var i=0; i< this.opts.items.length; i++){
@@ -62,6 +63,10 @@ bricks.Accordion = class extends bricks.VBox {
 		}
 		var c = objget(this.subcontents,name);
 		if (refresh || ! c ){
+			if (!this.opts.items[pos].content){
+				console.log('***', pos, 'item dont has content');
+				return;
+			}
 			c = await bricks.widgetBuild(this.opts.items[pos].content);
 			this.subcontents[name] = c;
 		}
diff --git a/bricks/audio.js b/bricks/audio.js
index ecaa48f..2f06e57 100755
--- a/bricks/audio.js
+++ b/bricks/audio.js
@@ -232,7 +232,7 @@ bricks.AudioRecorder = class extends bricks.HBox {
 		downA.href=this.recordData.url;
 		downA.download=fileName;
 		// document.querySelector("."+cls).appendChild(downA);
-		if(/mobile/i.test(navigator.userAgent)){
+		if(bricks.is_mobile()){
 			bricks.debug('mobile device');
 		}
 		downA.click();
diff --git a/bricks/bricks.js b/bricks/bricks.js
index 276e23a..a810f32 100755
--- a/bricks/bricks.js
+++ b/bricks/bricks.js
@@ -460,6 +460,7 @@ bricks.App = class extends bricks.Layout {
 		*/
 		super(opts);
 		bricks.app = this;
+		bricks.bug = opts.debug || false;
 		bricks.Body = this;
 		this.deviceid = bricks.deviceid(opts.appname || 'appname');
 		this.login_url = opts.login_url;
@@ -482,6 +483,12 @@ bricks.App = class extends bricks.Layout {
 		this._Height = this.dom_element.offsetHeight;
 		document.addEventListener('keydown', this.key_down_action.bind(this));
 	}
+	screenHeight(){
+		return this.dom_element.clientHeight;
+	}
+	screenWidth(){
+		return this.dom_element.clientWidth;
+	}
 	create(){
 		this.dom_element = document.getElementsByTagName('body')[0];
 		this.set_baseURI(this.dom_element.baseURI);
diff --git a/bricks/jsoncall.js b/bricks/jsoncall.js
index 24f6be6..8b29503 100755
--- a/bricks/jsoncall.js
+++ b/bricks/jsoncall.js
@@ -43,8 +43,16 @@ bricks.HttpText = class {
 			"Accept":"text/html",
 		};
 		bricks.extend(this.headers, headers);
+		var width=0, height=0;
+		if (bricks.app) {
+			width = bricks.app.screenWidth();
+			height = bricks.app.screenHeight();
+		}
 		this.params = {
-			"_webbricks_":1
+			"_webbricks_":1,
+			"width":width,
+			"height":height,
+			"_is_mobile":bricks.is_mobile()
 		}
 	}
 	url_parse(url){
diff --git a/bricks/layout.js b/bricks/layout.js
index e251d82..51d1cdf 100755
--- a/bricks/layout.js
+++ b/bricks/layout.js
@@ -139,6 +139,9 @@ bricks.Layout = class  extends bricks.JsWidget {
 		} else {
 			// append child at end
 			w.parent = this;
+			if (this.baseURI && !w.baseURI){
+				w.set_baseURI(this.baseURI);
+			}
 			this.children.push(w);
 			this.dom_element.appendChild(w.dom_element);
 		}
diff --git a/bricks/utils.js b/bricks/utils.js
index eb52d15..810377e 100755
--- a/bricks/utils.js
+++ b/bricks/utils.js
@@ -21,7 +21,11 @@ bricks.debug = function(...args){
 	try {
 		throw new Error();
 	} catch (e) {
-		callInfo = e.stack.split('\n')[2].trim();
+		try {
+			callInfo = e.stack.split('\n')[2].trim();
+		} catch (e1) {
+			callInfo = e.toString();
+		}
 	}
 	console.log(callInfo, ...args);
 }
@@ -259,6 +263,9 @@ bricks.absurl = function(url, widget){
 		return url;
 	}
 	var base_uri = widget.baseURI;
+	if (!base_uri){
+		base_uri = bricks.Body.baseURI;
+	}
 	if (url.startsWith('/')){
 		base_uri = bricks.Body.baseURI;
 		url = url.substring(1);
diff --git a/bricks/widget.js b/bricks/widget.js
index cae5872..b20a143 100755
--- a/bricks/widget.js
+++ b/bricks/widget.js
@@ -211,8 +211,16 @@ bricks.JsWidget = class {
 		this.id = id;
 		this.dom_element.id = id;
 	}
-	set_baseURI(url){
-		this.baseURI = url;
+	set_baseURI(uri){
+		this.baseURI = uri;
+		if (!this._container){
+			return;
+		}
+		this.children.forEach(c =>{
+			if (!c.baseURI){
+				c.set_baseURI(uri);
+			}
+		});
 	}
 	show(){
 		this.dom_element.style.display = '';