1<html> 2 <head> 3 <title>Loading...</title> 4 </head> 5 <body onload="attachUnloadListener()"> 6 <script> 7 function attachUnloadListener() { 8 window.addEventListener('unload', onUnload, false); 9 document.title = "set cookie on unload"; 10 } 11 12 function onUnload() { 13 document.cookie = "onunloadCookie=foo"; 14 } 15 </script> 16 <p>Navigate to another page to set cookie</p> 17 </body> 18</html> 19