<!-- save this file as unselectable.htc and remember where you put it -->
    <public:component lightweight="true">
        <public:attach event="ondocumentready" onevent="unselectable()" />
        <script type="text/javascript">
            function unselectable(){
                element.onselectstart = function(){ return false; };
                element.setAttribute('unselectable', 'on', 0);
            }
        </script>
    </public:component>