Toggle password field

gistfile1.js

$(function() {
    $('input[type="password"]')
        .each(function() {
            var that = this;
            $(this).after($('<input>')
                .attr('type', 'checkbox')
                .click(function() {
                    that.type = (that.type === 'password' ? 'text' : 'password');
                })
                .after($('<span>'))
                    .text('Show'));
        });
});