onUnload() JavaScript

[lensherm]

what would be the JavaScript syntax for using onUnload() function to send a POST http request if the browser page is either closed or another URL is opened from within the current browser window?

[ace21]

Same as it is for onLoad() except that if the browser is exited it won't occur.

Ace21

[lensherm]

In that case this doesn't solve my problem. Of course I could popup another window using document.onUnload() which in turn will execute the form.send() as a result of document.onload() function, but I wanted to stay away from pop-up browser windows. Anyone have other ideas?