progress availability check added

8658830f · Vadim Makeev · c1c5b350 · 8658830f
Commit 8658830f authored Jul 21, 2011 by Vadim Makeev
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script.js scripts/script.js +1 -0

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--- a/scripts/script.js
+++ b/scripts/script.js
@@ -65,6 +65,7 @@
 	}

 	function updateProgress(slide_number) {
+		if (!progress) return;
 		progress.style.width = (100 / (slideList.length - 1) * normalizeSlideNumber(slide_number)).toFixed(2) + '%';
 	}