U.Helper

$(document).ready(function()
{
  //hide the all div except first one
  $('.msg_body:not(:first)').hide();
  //when the anchor is clicked content gets faded
  $("a.linkclass").click(function()
  {
  $('.msg_body').fadeOut("slow");
  $($(this).attr("href")).fadeIn("slow");
  });
   
});