$(document).ready(function(){
	//hide the all of the element with class msg_body
	$("#topic1").hide();
	//toggle the componenet with class msg_body
	$("a#dropdown1").click(function(){
		$(this).next("#topic1").slideToggle(300);
		return false;
	});
	//hide the all of the element with class msg_body
	$("#topic2").hide();
	//toggle the componenet with class msg_body
	$("a#dropdown2").click(function(){
		$(this).next("#topic2").slideToggle(300);
		return false;
	});
});