From 92e2f47f18c850e36474497f3b6a72e2aaafd42c Mon Sep 17 00:00:00 2001
From: Bala Clark <balaclark@gmail.com>
Date: Sat, 25 Dec 2010 09:44:57 +0100
Subject: [PATCH] enable the back button

---
 lib/ComicBook.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/lib/ComicBook.js b/lib/ComicBook.js
index bf20176..958e239 100644
--- a/lib/ComicBook.js
+++ b/lib/ComicBook.js
@@ -66,7 +66,16 @@ function ComicBook(id, srcs, opts) {
 	
 	// the current page, can pass a default as a url hash
 	var pointer = (parseInt(location.hash.substring(1),10) - 1) || 0;
-	
+
+	// enables the back button by tracking any url hash changes and loading the correct page.
+	setInterval(function() {
+		var hash = parseInt(location.hash.substring(1),10) - 1;
+		if (hash !== pointer) {
+			pointer = hash;
+			ComicBook.prototype.draw();
+		}
+	}, 300);
+
 	/**
 	 * Figure out the cursor position relative to the canvas.
 	 *