$('#topnav_course_menu').hide();
$('#ajax-modal').html('<%= escape_javascript(render :partial => 'join_private_course') %>');
showModal('ajax-modal', '540px');
$('#ajax-modal').css('height','390px');
//$('#ajax-modal').siblings().remove();
$('#ajax-modal').siblings().hide();
$('#ajax-modal').before("<span style='float: right;cursor:pointer;padding-left: 513px;'>" +
        "<a href='javascript:' onclick='hidden_join_course_form();'><img src='/images/bid/close.png' width='26px' height='26px' /></a></span>");
$('#ajax-modal').parent().removeClass("alert_praise");
$('#ajax-modal').parent().css("top","").css("left","");
$('#ajax-modal').parent().addClass("alert_box");