Refreshing ASP.Net GridView Periodically using Timer removes CheckBox selections

Hi Mudassar, 

I am refreshing my gridview every 10 sec using update panel and Timer control.

In timer control i have:

protected void Timer1_Tick(object sender, EventArgs e) { gv1.DataBind(); }

Now i have a checkbox column in the gridview, and select all checkbox also, for functionality of checkboxes i am using javascript like what is explained by this article: http://www.aspsnippets.com/Articles/Implement-check-all-checkbox-functionality-in-ASP.Net-GridView-control-using-JavaScript.aspx

I like this way its simple and fast. but now when gridview refreshes the checkbox selection and others styles disappears.

Now what can i do to keep my selection as it is on gridview refresh. Do i have to stop the gridview refresh on checkbox selection?

Thanks