codice:
<scripttype="text/javascript">
function showNode (sID){
    //alert (sID);
    showNode.active && showNode.active.style.setProperty("display","none");
    if(sID !=0){
        //alert (sID);
        showNode.active = document.getElementById(sID);
        showNode.active && showNode.active.style.setProperty("display","block");
    }

}
</script>

????????????????????