How do i detect if a browser(chrome) window is refreshed or closed?

Question

This code works fine but worked in IE,I need in google chrome thanks.

    var isRefresh;
    function detectRefresh(){
     try
     {
       if(window.opener.title == undefined){
         isRefresh = true;
         document.write('Window was refreshed!');
       }
     }
     catch(err)
     {
       isRefresh = false;
       document.write('Window was closed!');
     } 
   }