$(document).ready(function(){
//hide the all of the element with class msg_body
$(".expand").hide();
//toggle the componenet with class msg_body
$(".read-more").click(function()
{
$(this).prev(".expand").slideToggle(600);
var anchor = document.getElementById('readLink');
var val = anchor.innerText;
anchor.innerText = (val == "Hide") ? "Additional Information" : "Hide";
return false;
});
});