diff --git a/bricks/iframe.js b/bricks/iframe.js
index 1c7b6bd..ecdfe91 100644
--- a/bricks/iframe.js
+++ b/bricks/iframe.js
@@ -13,7 +13,7 @@ bricks.Iframe = class extends bricks.Layout {
 bricks.NewWindow = class extends bricks.JsWidget {
 	constructor(opts){
 		super(opts);
-		window.open(opts.url, target=opts.name || '_blank');
+		window.open(opts.url, opts.name || '_blank');
 	}
 }
 
diff --git a/bricks/tree.js b/bricks/tree.js
index f51a66f..33a07fe 100644
--- a/bricks/tree.js
+++ b/bricks/tree.js
@@ -290,7 +290,7 @@ bricks.Tree = class extends bricks.VScrollPanel {
 				break;
 			default:
 				if ((opts.selected_data || opts.checked_data) && ! this.selected_node){
-					w = new bricks.Error({title:'Error', message:'No selected node found'});
+					var w = new bricks.Error({title:'Error', message:'No selected node found'});
 					w.open();
 					return;
 				}