Hi,
If you assign a string to event.returnValue, that will work on Firefox
and IE:
Event.observe(window, 'beforeunload', function(event) {
event.returnValue = "Really leave?";
});
But it doesn't work on Chrome, Safari, or Opera, so it's of fairly
limited use. :-)
I'm not aware of a cross-platform way of doing this except with a DOM0
handler (assigning directly to the property, happily bludgeoning
anyone else's handler there), which seems...wrong.
--
T.J. Crowder
tj / crowder software / com
www.crowdersoftware.com
On Sep 15, 10:16 am, JoJo <tokyot...@gmail.com> wrote:
> I have this code and it works very well:
>
> ++++++++++++++++++++++++++++
>
> window.onbeforeunload = function() {
> if (this.hasUnsavedChanges) {
> return 'you have unsaved changes';
> }
>
> }.bind(this);
>
> +++++++++++++++++++++++++++++
>
> But when I try to convert it to Prototype style, it doesn't work. I
> get no confirmation box asking me if I want to stay on the page. I
> want to be as cross-browser compatible as possible, so could someone
> help me do it the Prototype way?
>
> ++++++++++++++++++++++++++++
>
> Event.observe(
> window,
> 'beforeunload',
> function() {
> if (this.hasUnsavedChanges) {
> return 'you have unsaved changes.';
> }
> }.bind(this)
> );
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