Sample: dhtmlxToolbar Button Select Listed Option Manipulation dhtmlxToolbar main page
X
 
<script>
 
    var webBar = new dhtmlXToolbarObject("toolbarObj");
    ...
    // showing a listed option
    webBar.showListOption(itemId, optionId);
    // hiding a listed option
    webBar.hideListOption(itemId, optionId);
    // is a listed option visible
    var isVisible = webBar.isListOptionVisible(itemId, optionId);
</script>