yan

<html
<head>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript" src="js/jquery.optionTree.js"></script>
</head>
<body>

<input type="hidden" name="demo2" />
<script type="text/javascript">
$(function() {
    var option_tree = {"Option 1": {"Suboption": 200},
                       "Option 2": {"Suboption 2": {"Subsub 1":201, "Subsub 2":202},
                                    "Suboption 3": {"Subsub 3":203, "Subsub 4":204, "Subsub 5":205}}
                       };

    var options = {empty_value: -1, choose: '...'};
    $('input[name=demo2]').optionTree(option_tree, options)
            .change(function() { alert('Field ' + this.name  + ' = ' + this.value )});

});
</script>

</body>
</html>