Javascript timeout

I am using one javascript confirm which will get called after 15 minutes repeatedly.If user selects none of the options in the confirm box i will redirect him after waiting for 1 minute.How to achieve this? My code i开发者_JAVA百科s like

    var timeout = 15*60000;

    setTimeout("timeoutConfirm();",timeout);
    function redirectToClose(){
        var action='Some Action';
        document.mainForm.action = action;
        document.mainForm.submit();
    }
    function timeoutConfirm(){
        if(confirm('Please click OK to continue working on this page')){
            setTimeout("timeoutConfirm();",timeout);
        }else{
            redirectToClose();
        }
    }

You are better off creating your own confirm dialog (as a overlay, for example).

This is because the confirm will halt all javascript on the page until the user clicks the dialog. You will not be able to redirect after a wait, as your code will not execute.