$(function() {
$.tablesorter.addWidget({
	id: "zebra2",
	format: function(table){
		$("tr:visible",table.tBodies[0])
			.removeClass('odd').filter(':not([@class])').filter(':odd').addClass('odd');
	}
});
$.tablesorter.addParser({
	id: "commaNum",
	is: function(s) {
		return false;
	},
	format: function(s) {
		return s.replace(/,/g,'');
	},
	type: 'numeric'
});
$("#portfolio").tablesorter({
			widgets: ['zebra2'],
                        textExtraction: complex,
			headers: {
                8: {
                    sorter:'commaNum'
                }
         }
		});

});