[Title] revise document -> window according to Tizen 2.2 App guide

Change-Id: I2094b09a55457cfc512d3f4f9264ca093cf1f422

diff --git a/js/main.js b/js/main.js
index 8d8ec34..b586cd7 100755 (executable)
--- a/js/main.js
+++ b/js/main.js
@@ -22,7 +22,7 @@ function deviceOrientationEvents() {
 
 window.onload = function() {
     //add eventListener for tizenhwkey
-    document.addEventListener('tizenhwkey', function(e) {
+    window.addEventListener('tizenhwkey', function(e) {
         if(e.keyName == "back")
             tizen.application.getCurrentApplication().exit();
     });