title: p:selectCheckboxMenu and availables p:ajax events
body: <p>Ive been looking for all p:ajax events relateds with p:selectCheckBoxMenu</p>
  
  <p>I need to click on selectCheckBoxMenu dropdown arrow and load again my object from bean. </p>
  
  <p>Google it but with no success.</p>
  
  <p>thanks in advance stack members.</p>