$(document).ready(function(){
   $("#btnSubmit").click(function(){

  $.ajax({
   type: "POST",
   url: "testmail.php",
   data: "email="+$('#email').val()+"&body="+$('#body').val(),
   success: function(msg){
      $('#contact-form').slideUp();
        $('#thank-you').slideDown();
   }
 });
       
    });
});