title: javascript function of user control doesnt work for multiple instances of the control
body: <p>I've made a user control for an ASP.NET page - the user control has a gridview and a global variable that keeps the last selected row.
  in my main page I declare the user control twice. each user control has a different id.
  finally, when I use both of the user controls, the code within the user control applies only on the first instance and not the second user control I declared on the page. how can I solve this?</p>