var fields = new Array(
            $('#username').val(),
            $('#password').val(),
            $('#email').val(),
            $('#firstname').val() + ' ' + $('#lastname').val(),
            $('#age').val(),
            $('#gender').val(),
            $('#country').val()
        );
        var tr = $('#fourth_step tr');
        tr.each(function(){
            //alert( fields[$(this).index()] )
            $(this).children('td:nth-child(2)').html(fields[$(this).index()]);
        });