<!DOCTYPE html>
<title>IDBCursor.advance() - index - attempt to advance backwards</title>
<link rel="author" href="mailto:odinho@opera.com" title="Odin HÃ¸rthe Omdal">
<link rel=help href="http://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#widl-IDBCursor-advance-void-unsigned-long-count">
<link rel=assert title="The value passed into the count parameter was zero or a negative number.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script