Merge pull request #79 from jkarkoszka/master

prevent to go on out of ranges page
futurepress · Jan 3, 2014 · be2c2d0 · be2c2d0
2 parents a236806 + dddbcaf
commit be2c2d0
Showing 1 changed file with 2 additions and 4 deletions.
diff --git a/src/book.js b/src/book.js
@@ -583,16 +583,14 @@ EPUBJS.Book.prototype.prevPage = function() {
 };
 
 EPUBJS.Book.prototype.nextChapter = function() {
-	this.spinePos++;
 	if(this.spinePos > this.spine.length) return;
-
+	this.spinePos++;
 	return this.displayChapter(this.spinePos);
 };
 
 EPUBJS.Book.prototype.prevChapter = function() {
+	if(this.spinePos < 1) return;
 	this.spinePos--;
-	if(this.spinePos < 0) return;
-
 	return this.displayChapter(this.spinePos, true);
 };