jQuery Forum

Could someone point me any jquery function or plugin to control popups?

I need to close a login form (popup) if the user forget it opened (after timeout without user activity)

That is what I tried: (javascript only)

1. var popup , last_history = 0 ;
2. 
   
3. function open_my_popup(url) {
4.    popup = window.open(url, 'my_popup', '');
5.    setTimeout("clock()", 5000);
6. }
7. 
   
8. function clock(){
9.   if( popup.history.length; > last_history ){
10.      last_history = popup.history.length;
11.      setTimeout("clock()", 10000);
12.   } else popup.close();
13. }
14. 
    
15. open_my_popup( "http://jquery.com" );
16. 
    

But it let me get the error "permission denied to read window.history.lenght"

Is there any jQuery alternative?