Closing Web Page
- Thread starter msvidron
- Start date
kulrom
Well-known member
JavaScript my friend. There is a way to acomplish it indeed 
kulrom
Well-known member
Ok, i will but, 1st let me know what are the criterias that you want to check before close the window instance there is a big difference i.e. if you want to check some variables on server-side (asp.net code) ...
there is a big difference i.e. if you want to check some variables on server-side (asp.net code) ... Sorry. I sure that would help. Here's what I need to do. I have to listboxes on a webpage. When a user clicks on one list and it populates the second list and removes record from first list. Now, I what to check to make sure nothing is in the second list before the page closes. If the user clicks on the x in upper right corner, I need a message appear alerting them they can't close the window until they process the records in the second list.
I also think you have to use Javascript, first add the onbeforeunload event to body:
then this script in head section:
Substitute "ListBox1" for the ID of the listbox to be counted for on exit
HTML:
<body onbeforeunload="Javascript:closeIt()">
HTML:
<script type="text/javascript">
function closeIt(){
if (document.getElementById("ListBox1").options.length>0)
{event.returnValue = "Confirmation message.";}
}
</script>JohnM,
Thanks for the reply. I tried the javascipt code you sent and still the page closes. I am getting on error on the html side saying that onbeforeunload is not an attribute of the body element. any thoughts?
Thanks for the reply. I tried the javascipt code you sent and still the page closes. I am getting on error on the html side saying that onbeforeunload is not an attribute of the body element. any thoughts?
It does what it is supposed to here. Perhaps it is Internet Explorer only?
MSDN onbeforeunload Event: http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/events/onbeforeunload.asp
Expand the example section of the linked page and click "Show me", it's the same functionality and it works in IE at least.
(edit: looks like IE and Firefox supports this non-standard event.)
MSDN onbeforeunload Event: http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/events/onbeforeunload.asp
Expand the example section of the linked page and click "Show me", it's the same functionality and it works in IE at least.
(edit: looks like IE and Firefox supports this non-standard event.)
Last edited:
No, this is as close you get. And when you think it through, whatever is displaying in a browser window is not important if user or system needs to close that application. A confirmation that permits the close needs to be there.msvidron said:
My opinion is that there should be an option in supportive browsers to disable this event altogether, because of the risk of malpages to exploit it for further annoyance.
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