Conditional window.open

Posted: Wed Jan 29, 2003 9:33 pm (21 years, 2 months ago)

Hi.

Can you help me with this:

I want javascript to opena window if the window called "newmessage" isn't allready open. I know how to open the window, but not how to make it not open if it is allready open.

Thank you,

WebHelper Joined: 30 Jul 2002 Posts: 56 Location: UK

Iyonix wrote:

Hi.

Can you help me with this:

I want javascript to opena window if the window called "newmessage" isn't allready open. I know how to open the window, but not how to make it not open if it is allready open.

Could you use a hidden input field, or perhaps just a javascript variable as a flag indicating if the window has been opened. In your window opener function, set this flag to true the first time the window is opened. After that, the function looks at the flag and does not open the window again.

Hope that helps,
Hertzsprung

Posted: Thu Jan 30, 2003 4:26 pm (21 years, 2 months ago)

Hertzsprung wrote:

Iyonix wrote:

Hi.

Can you help me with this:

I want javascript to opena window if the window called "newmessage" isn't allready open. I know how to open the window, but not how to make it not open if it is allready open.

Could you use a hidden input field, or perhaps just a javascript variable as a flag indicating if the window has been opened. In your window opener function, set this flag to true the first time the window is opened. After that, the function looks at the flag and does not open the window again.

Hope that helps,
Hertzsprung

Thanks, But that wouldn't know if the window has been closed though. Sad

WebHelper Joined: 30 Jul 2002 Posts: 56 Location: UK

Iyonix wrote:

Hertzsprung wrote:

Could you use a hidden input field, or perhaps just a javascript variable as a flag indicating if the window has been opened. In your window opener function, set this flag to true the first time the window is opened. After that, the function looks at the flag and does not open the window again.

Hope that helps,
Hertzsprung

Thanks, But that wouldn't know if the window has been closed though. Sad

Ah yes, good point. Could you use an onunload event handler? But you probably couldn't update the flag because it would be accessible only by the main page, not the popuop page...
Okay, you've got me stumped. Why do you want to do this, anyway? Razz

Posted: Thu Jan 30, 2003 4:52 pm (21 years, 2 months ago)

Hertzsprung wrote:

Iyonix wrote:

Hertzsprung wrote:

Could you use a hidden input field, or perhaps just a javascript variable as a flag indicating if the window has been opened. In your window opener function, set this flag to true the first time the window is opened. After that, the function looks at the flag and does not open the window again.

Hope that helps,
Hertzsprung

Thanks, But that wouldn't know if the window has been closed though. Sad

Ah yes, good point. Could you use an onunload event handler? But you probably couldn't update the flag because it would be accessible only by the main page, not the popuop page...
Okay, you've got me stumped. Why do you want to do this, anyway? Razz

A frame auto refreshes to check if the user has any new messages. If they do it opens the message window. I don't want it to open the window again if they get another message and it is allready open.

Posted: Thu Jan 30, 2003 5:10 pm (21 years, 2 months ago)

Can anyone else help please?

I expect it will be some JS code. I am continuing to search on Google but to no avail Sad