Sort songs list by length

(function() {
   var head= document.getElementsByTagName('head')[0];
   var script= document.createElement('script');
   script.type= 'text/javascript';
   script.src= 'http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js';
   head.appendChild(script);
}());

$(document).ready(function() {
    $('table:first tr:first th:nth-child(7)').replaceWith('<th id="lengthSort" nowrap><a>Length</a></th>');
    $('#lengthSort').css({'color':'#4A84B5', 'cursor':'pointer'}).on('click', function() {
        var rows = $('table:first tr').toArray(), rowsString = '';

        rows.shift();
        rows.sort(function(a, b) {
            var time1 = $(a).children('td:nth-child(7)').text().split(':'),
            time2 = $(b).children('td:nth-child(7)').text().split(':');
        
            time1 = time1[0] * 60 + time1[1] * 1;
            time2 = time2[0] * 60 + time2[1] * 1;

            return time1 - time2;
        });

        for (var i = 0; i < rows.length; i++) {
            rowsString += $(rows[i])[0].outerHTML;
        }

        $('table:first').replaceWith('<table width="770">' + $('table:first tr:first')[0].outerHTML + rowsString + '</table>');
    });
});