Sample: dhtmlxToolbar Two-State Button State dhtmlxToolbar main page
X
 
<script>
 
    var webBar = new dhtmlXToolbarObject("toolbarObj");
    ...
    // enabling a two-state button
    webBar.enableItem(itemId);
    // disabling a two-state button
    webBar.disableItem(itemId);
    // is a two-state button enabled
    var isEnabled = webBar.isEnabled(itemId);
</script>