// JavaScript Document

     $(document).ready(function() 
    { 
      //hide the all of the element with class msg_body 
      $(".commentaires").hide(); 
      //toggle the componenet with class msg_body 
      $(".affichagecommentaire").click(function() 
      { 
        $(this).next(".commentaires").slideToggle(600); 
      }); 
    });