$(function(){ 
  
  settings = {
          tl: { radius: 8 },
          tr: { radius: 8 },
          bl: { radius: 8 },
          br: { radius: 8 },
          antiAlias: true,
          autoPad: true,
          validTags: ["div"]
      }

  $('.msg_list').corner(settings);
  
  });;
$(document).ready(function(){
	//hide the all of the element with class msg_body
	 $(".msg_body").hide();	 
	//toggle the componenet with class msg_body
	$(".msg_head").click(function(){
		$(this).next(".msg_body").slideToggle(250);
	});
});