jQuery Cookie 為何無法刪除舊cookie的解決方法

jquery_cookie_delete_old_cookie.js

/*Another reason why $.cookie could not be working 
(jquery.cookie doesn't delete a cookie) 
- maybe not in this case, but in general may 
someone look at this page and need this 
information - is because you set it for 
a specific path but you're trying to delete it 
without setting the path again.
*/

//Example:
//if you set the cookie like this

$.cookie("CookieName", "yourValue", { path: '/' });  

//and you try to delete it this way:

$.cookie("CookieName",null);  

//that will not work, you must write:

$.cookie("CookieName", null, { path: '/'});  

//or wathever path you choose before.