I open a new tab using window.open. The new tab has a javascript myfunction function in it defined in a script tag. From the window that opens the new window, I want to run that function.

How can I do that?

Thanks

Something like

var a = window.open(mypage.html, _blank);

a.myfunction(hi);

EDIT

This isn't working. Its not doing the alert.

opener

        var w = window.open(../scripts/map.php, _blank);

        w.postMessage(The user is 'bob' and the password is 'secret', *);

new tab

        function receiveMessage(event) {

            alert(event.data);

        }

        window.addEventListener(message, receiveMessage, false);