NaN results from the CPAN

Foorum
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<h1> NAME </h1><p>Foorum::Manual::Tutorial4 - Tutorial 4: jQuery javascript framework</p><h2> Short Introducation </h2><p><a href="http://jquery.com/" rel="nofollow">jQuery</a> is a fast, concise, JavaScript Library that simplifies how you traverse H...
        
        // disabled the Submit and Reset when submit a form
        // to avoid duplicate submit
        $(theform).submit( function() {
            $('input:submit').attr( { disabled : 'disabled' } );
            $('input:reset').attr(  { disabled : 'disabled' } );
        } );
        
        // Press Ctrl+Enter to submit the form. like QQ.
        $(theform).keypress( function(evt) {
            var x = evt.keyCode;
            var q = evt.ctrlKey;
            
            if (q &amp;&amp; (x == 13 || x == 10)) {
                theform.submit();
            }
        } );
    } );
</pre><ul><li>timezone auto-detection.  2008-01-17 15:46:33  in my local time, meanwhile that's  2008-01-17 16:46:33  in your computer. that's provided by this piece of code. (put class="date" in MySQL DateTime format span. &lt;span class="date"&gt;2...
    // utility method
    var _zeroPad = function(num) {
        var s = '0'+num;
        return s.substring(s.length-2)
        //return ('0'+num).substring(-2); // doesn't work on IE :(
    };
    
   $(".date").each(function (i) {
        var s = $(this).text();
        if (! s) { return false; }
 
        var f = this.id; //format
        if (! f) {
            f = 'yyyy-mm-dd hh:ii:ss';
        }
        
        var d = new Date(1997, 1, 1, 1, 1, 1);
        var iY = f.indexOf('yyyy');
        if (iY &gt; -1) {
            d.setFullYear(Number(s.substr(iY, 4)));
        }
        var iM = f.indexOf('mm');
        if (iM &gt; -1) {
            d.setMonth(Number(s.substr(iM, 2)) - 1);
        }
        d.setDate(Number(s.substr(f.indexOf('dd'), 2)));
        d.setHours(Number(s.substr(f.indexOf('hh'), 2)));
        d.setMinutes(Number(s.substr(f.indexOf('ii'), 2)));
        d.setSeconds(Number(s.substr(f.indexOf('ss'), 2)));
        
        var timezoneOffset = -(new Date().getTimezoneOffset());
        d.setMinutes(d.getMinutes() + timezoneOffset);
        
        if (! isNaN(d.getFullYear()) &amp;&amp; d.getFullYear() &gt; 1997) {
            var t = f
                .split('yyyy').join(d.getFullYear())
                .split('mm').join(_zeroPad(d.getMonth()+1))
                .split('dd').join(_zeroPad(d.getDate()))
                .split('hh').join(_zeroPad(d.getHours()))
                .split('ii').join(_zeroPad(d.getMinutes()))
                .split('ss').join(_zeroPad(d.getSeconds()))
                ;
        
            $(this).text(t);
        }
   } );
</pre><p>Above code is from <a href="http://foorum.googlecode.com/svn/trunk/root/static/js/utils.js" rel="nofollow">http://foorum.googlecode.com/svn/trunk/root/static/js/utils.js</a> it may be changed later.</p><h2> jQuery UI </h2><p><a href="http://...
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<li>Get the lastest version from <a href="http://code.google.com/p/foorum/wiki/Tutorial4">http://code.google.com/p/foorum/wiki/Tutorial4</a></li>
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