How to use onload and onunload in a same javascript program?

Question

My code is:-

<html>
<head>
    <script>
        function welcome()
        {
            alert("Successfully loaded");
        }
        function bye()
        {
            alert("Unload");
        }
    </script>
</head>
<body onload="welcome()" onunload="bye()">

</body>

when i execute this only the function for "onload()" is called. Can you tell me how to trigger "onunload()" event also...

I'm not sure you can alert from onunload. Try onbeforeunload. — John Dvorak
– John Dvorak, Commented Apr 14, 2013 at 6:56

Netorica · Accepted Answer · 2013-04-14 07:07:22Z

1

It really depends on what browser you test it

The onunload event is supported in IE, Firefox, and Safari, but not supported properly in Chrome or Opera.

please try onbeforeunload

<body onload="welcome()" onbeforeunload="bye()">

</body>

https://developer.mozilla.org/en-US/docs/DOM/window.onbeforeunload

edited Apr 14, 2013 at 7:07

answered Apr 14, 2013 at 6:58

Netorica

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3 Comments

Ian Over a year ago

Well, that's an opinion that it's not supported "properly", unless there's a specification of what should or should not (be allowed to) happen in unload. Can you provide any reference to that or how Chrome/Opera differs?

Netorica Over a year ago

using jquery is not an option?

John Dvorak Over a year ago

@Mahan you can suggest, but I can't see how it could help

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