Sample: dhtmlxToolbar Two-State Button Pressed State dhtmlxToolbar main page
X
 
<script>
 
    var webBar = new dhtmlXToolbarObject("toolbarObj");
    ...
    // setting two-state button's state (pressed/released)
    webBar.setItemState(itemId, state);
    // getting two-state button's state
    var isPressed = webBar.getItemState(itemId);
</script>