mouseUpHandlerRegistration.removeHandler();
mouseUpHandlerRegistration = null;
mouseUpJs = js.trim();
if(!mouseUpJs.isEmpty())
{
mouseUpHandlerRegistration = super.getTextBox().addMouseUpHandler(new MouseUpHandler() {
@Override
public void onMouseUp(MouseUpEvent event) {
VkStateHelper.getInstance().getEventHelper().executeEvent(mouseUpJs, event, true);
}
});