I do not need to create my own confirm dialog box.  A confirm dialog box 
is automatically built into the onBeforeUnload event by setting the 
returnValue property of the event to a string.  (I set the returnValue to 
a string in my function that checks the value of the dirty flag). I need 
to detect the cancel of this dialog box and then perform my function after 
that, but I do not know how.  Using if !confirm will not work in this case.

> If you're using confirm:
    if(!confirm("Your question...")){
        executeYourFuntion()
    }
/Peter

> How do I detect if the cancel button has been clicked on the dialog box
> generated by the unBeforeUnload event?  In my form, a flag is set anytime
> the user changes a field.  If the flag is true when the unBeforeUnload
> event is triggered, I return a value so the the dialog box appears asking
> the user if they want to leave the page because changes have been made. 
If
> the user clicks cancel, then I need to execute a function that resets 
some
> of the form field values.  The problem is that I don't know how to detect
> the cancel so that I can call the function.  Can you please help?