Single:
Option One
Option Two
Option Three
Option Four
Option Five
Option Six
Option Seven
Option Eight
Single (required):
Option One
Option Two
Option Three
Option Four
Option Five
Option Six
Option Seven
Option Eight
Multiple:
Option One
Option Two
Option Three
Option Four
Option Five
Option Six
Option Seven
Option Eight
Optgroup:
Option One
Option Two
Option Three
Option Four
Option Five
Option Six
Option Seven
Option Eight
Clickable optgroup:
Option One
Option Two
Option Three
Option Four
Option Five
Option Six
Option Seven
Option Eight
适用浏览器：360、FireFox、Chrome、Safari、Opera、傲游、搜狗、世界之窗. 不支持IE8及以下浏览器。
来源：
Gxl网-jquery插件