*
* @return ajax call decorator
*/
protected IAjaxCallDecorator getAjaxCallDecorator()
{
return new IAjaxCallDecorator() {
public CharSequence decorateScript(CharSequence script) {
StringBuilder js = new StringBuilder();
CharSequence sel = getBlockElementsSelector();
if( sel != null ) {
js.append( "$('" ).append( sel ).append( "').block( " );