在updatepanel部分回发中通过jquery添加css类

I'm using ASP.NET Ajax with JQuery. I have a click event that adds/removes css classes on objects in an UpdatePanel, but when the ASP.NET Partial postback occurs, I lose the "state." Here is minimal example I tried to create; how do I keep the css class state? I'm using ASP.NET Ajax with JQuery. I have a cl