javascript - window.onclose function

Question

I use this function to call on my window close.

This is the confirmation box popup window.

if(confirm("Sure you want to close the window");
{
     // yes return to submit function
}
else
{
  // no return to Other call function
}

window.onclose = function()
{
  alert('yes');
}

On Close of window on the top right corner with X symbol I need to return false. I am trying to use this window.onclose function but its not poping up.

Can anybody help me out?

Answer 1

Unfortunately the popup window does not have any close event that you can listen to but there is a closed property that is true when window gets closed. A solution to get around this problem is to start a timer and check the closed property of the child window every second and clear the timer when the window gets closed. Here is the code:

var win = window.open('http://www.google.com','google','width=800,height=600,status=0,toolbar=0');   
var timer = setInterval(function() {   
    if(win.closed) {  
        clearInterval(timer);  
        alert('closed');  
    }  
}, 1000);