Sample: dhtmlxToolbar Two-State Button Tooltip dhtmlxToolbar main page
X
 
<script>
 
    var webBar = new dhtmlXToolbarObject("toolbarObj");
    ...
    // setting a tooltip for a two-state button
    webBar.setItemToolTip(itemId, tip);
    // getting a tooltip of a two-state button
    var tip = webBar.getItemToolTip(itemId);
</script>