Use this for an example:
<html>
<head><title>Regular Expression Test</title>
<script type="text/javascript">
function Test (value) {
alert(value.replace(/\w{2}\d{1,2}\.pdf/i, ""));
}
</script>
</head><body>
<form action="">
<input type="button" value="Test 1" onclick="Test('../MyBook/Computer/Sample_1/Sample_1_p16.pdf')">
</form>
</body></html>
Best Regards,
—MRB