Untitled

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<title>Test</title>
<script type="text/javascript">


function Contact() {
        var state = false;
        this.onStateChange = function() {};

        this.getState = function() {
                return state;
        };
        this.setState = function(value) {
                state = value;
                this.onStateChange();
        };

}

function Connection(c1, c2) {
        c1.onStateChange = function() {
                c2.setState(c1.getState());
        };

        c2.onStateChange = function() {
                c1.setState(c2.getState());
        };
}

window.onload = function() {
        var ac1 = new Contact();
        var ac2 = new Contact();

        var conn1 = new Connection(ac1, ac2);

        ac1.setState(true);
        alert(ac2.getState());
}
</script>
</head>

<body>

</body>

</html>