Improve closing an HTML page and returning to previous page.

framework/assets/js/app.js

@@ -59,6 +59,14 @@ App.prototype.clearHistory = function() {
     PhoneGap.exec(null, null, "App", "clearHistory", []);
 };
 
+/**
+ * Go to previous page displayed.
+ * This is the same as pressing the backbutton on Android device.
+ */
+App.prototype.backHistory = function() {
+    PhoneGap.exec(null, null, "App", "backHistory", []);
+};
+
 /**
  * Override the default behavior of the Android back button.
  * If overridden, when the back button is pressed, the "backKeyDown" JavaScript event will be fired.
@@ -91,6 +99,8 @@ App.prototype.addWhiteListEntry = function(origin, subdomains) {
 
 PhoneGap.addConstructor(function() {
     navigator.app = new App();
+    navigator.app.origHistoryBack = window.history.back;
+    window.history.back = navigator.app.backHistory;
 });
 }());
 }