[wikka-community] A "crude" way to protect my wiki users

Wed May 21 22:56:06 GMT 2008

Hey guys,

Some of my users have been complaining of accidentally pressing *back* or
clicking on an URL and suddenly realize their unsaved changes to a wiki page
have just disappeared. I understood their frustration, since they are used
to the "user friendliness" of say MS Word. If GMail could do it, I could do
it as wel...

So here is my javascript solution, you add underneath snippet to header.php
just before </HEAD>

<SCRIPT LANGUAGE="JavaScript">
function AlertOnExit()
{
    var temp = new String(window.location.href);
    var temp2 = new String('/edit?id=');
    if (temp.indexOf(temp2) >= 0)
    {
        event.returnValue = "You have possibly not saved your changes in
wiki.";
    }
    else
    {
        // alert('Did not find '+temp2);
    }
}
</SCRIPT>

Then alter the body line, from:
<body <?php echo $message ? "onLoad=\"alert('".$message."');\" " : "" ?> >
To:
<body *onbeforeunload="AlertOnExit()"* <?php echo $message ?
"onLoad=\"alert('".$message."');\" " : "" ?> >

After uploading header.php to your server and refreshing your wiki page,
whenever you close or surf to another URL while a wiki page is being edited
you get a dialog asking whether you're sure.

It's my first encounter with javascript so I'm sure there is lots to be
improved :) hope somebody finds it usefull.
By the way, I got this working in Internet Explorer 6 and it worked for a
while in Firefox, then suddenly it broke... Still don't know why. If anyone
could me a pointer?

Cheers

Mick
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