Sample: dhtmlxToolbar Input Item Manipulation dhtmlxToolbar main page
X
 
<script>
 
    var webBar = new dhtmlXToolbarObject("toolbarObj");
    ...
    // showing an input item
    webBar.showItem(itemId);
    // hiding an input item
    webBar.hideItem(itemId);
    // is an input item visible
    var isVisible = webBar.isVisible(itemId);
</script>