Detect before/when the browser leaving to another webpage

When a JApplet is loaded and the browser browse to another webpage the applet (the main JFrame) is closed without a warning.  Can a I detect that it in advance to prevent the browser from leaving the webpage or at least warn the user or so?
LVL 2
s_lavieAsked:
Who is Participating?
 
TimYatesCommented:
<html>
    <head>
        <title>Tim's cool test!</title>

        <SCRIPT>
        <!--
            function unloadMess()
            {
                mess = 'Leaving so soon?' ;
                return mess;
            }

            function setBunload(on)
            {
                window.onbeforeunload = (on) ? unloadMess : null;
            }

            function pageLoaded()
            {
                alert( 'Setting the beforeUnload handler (IE ONLY)' ) ;
                setBunload(true);
            }

            function pageClosed()
            {
                alert( 'Closing the page' ) ;
            }
        //-->
        </SCRIPT>

    </head>
    <body bgcolor="#FFDDFF" onload="javascript:pageLoaded()" onUnload="javascript:pageClosed()">
        <a href="http://www.google.com">Go to google</a><br/>
        <a href="http://www.experts-exchange.com">Go to experts Exchange</a><br/><br/>
        Clicking either of these (in IE) will ask if you're sure!!
    </body>
</html>
0
 
TimYatesCommented:
add onLoad and onUnload javascript to the webpage...

That will fire javascript when the page is loaded, and when they leave the page...

You can't stop them leving though, so what you want to do isn't possible :-(
0
 
TimYatesCommented:
ie:

<body onLoad="alert( 'Hi!' )" onUnload="alert( 'Bye!' )">
0
Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
s_lavieAuthor Commented:
Can I issue a yes/no dialog that the user can regret before the browser leaves the webpage?
0
 
TimYatesCommented:
There is

onBeforeUnload

but it is only available in Internet Explorer

http://www.webreference.com/dhtml/diner/beforeunload/index.html

----------------

<SCRIPT LANGUAGE="JavaScript1.2" TYPE="text/javascript">
<!--
function unloadMess(){
    mess = Leaving so soon?"
    return mess;
}

function setBunload(on){
    window.onbeforeunload = (on) ? unloadMess : null;
}

setBunload(true);
//-->
</SCRIPT>
0
 
s_lavieAuthor Commented:
I'm quite weak with JavaScript.  I'd appreciate if you add a sample code that includes the yes/no dialog and the canceling of moving to another webpage,
10x
0
 
TimYatesCommented:
Mmmmm.....pink ;-)
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.