Radio button with Checkbox Behavior 介绍
This simple plugin will give Checkbox kind of functionality to your Radio
buttons.
If you ever wanted Radio buttons which you can select and then deselect then
you found what you wanted.
This plugin will let all/selected your Radio buttons behave like checkboxes.
It will let users check and then uncheck once they click on it again.
Radio button with Checkbox Behavior 官网
http://plugins.jquery.com/project/Radio_with_Checkbox_behavior