仅选择JavaScript

selected = $('#para-1');

仅选择Erlang

selected = $('.color-red.color-green');

选择JavaScript和Erlang

selected = $('.color-red');

选择所有编程语言

selected = $('[class^="color-"]');

选择名字input

selected = $('input[name=name]');

选择邮件和名字input

selected = $('input[name=name],input[name=email]');