$(document).ready(function() {
    function killOldIE() {
        if(navigator.appName == "Microsoft Internet Explorer") {
            if(/MSIE (\d+\.\d+);/.test(navigator.userAgent)) { 
                var ieversion=new Number(RegExp.$1);
                if(ieversion <= 7) {   
                    $("#shadowlayer").removeClass('hidden');
                    $("#closetopbox").removeClass('hidden');
                    $("#oldie").removeClass('hidden');
                }
            }
        }
    }

    killOldIE();
});