diff --git a/src/kiri/frame.js b/src/kiri/frame.js
index 87b88293..ed629ecb 100644
--- a/src/kiri/frame.js
+++ b/src/kiri/frame.js
@@ -4,7 +4,7 @@
 
 (function() {
     let KIRI = self.kiri = self.kiri || {};
-    let frame, cwin, onevent = {};
+    let frame, cwin, onevent = {}, targetOrigin;
 
     function $(id) { return document.getElementById(id) }
 
@@ -14,7 +14,7 @@
     }
 
     function send(msg) {
-        cwin.postMessage(msg);
+        cwin.postMessage(msg, targetOrigin);
     }
 
     function recv(msg) {
@@ -29,8 +29,9 @@
     }
 
     let API = KIRI.frame = {
-        setFrame: (io) => {
+        setFrame: (io, target) => {
             let type = typeof(io);
+            targetOrigin = target;
             switch (type) {
                 case 'string': setFrame($(io)); break;
                 case 'object': setFrame(io); break;
diff --git a/web/kiri/frame.html b/web/kiri/frame.html
index 80dd85ae..b89ae43e 100644
--- a/web/kiri/frame.html
+++ b/web/kiri/frame.html
@@ -147,7 +147,7 @@
         <li><label>load(url)</label> - where URL points to an STL</li>
         <li><label>clear()</label> - clear workspace</li>
         <li><label>parse(data,type)</label> - data is string or binary. type is "stl" or "svg"</li>
-        <li><label>setFrame(id_obj)</label> - id or object of iframe with Kiri:Moto loaded</li>
+        <li><label>setFrame(id_obj, target_origin)</label> - id or object of iframe with Kiri:Moto loaded</li>
         <li><label>setMode(mode)</label> - FDM, CAM, LASER, SLA</li>
         <li><label>setDevice(options)</label> - change default object parameters</li>
         <li><label>setProcess(options)</label> - change default process parameters</li>