https://thumbjam.com/_include/js/jquery.badBrowser.js

1function badBrowser(){
2	if($.browser.msie && parseInt($.browser.version) <= 6){ return true;}
3	
4	return false;
5}
6
7function getBadBrowser(c_name)
8{
9	if (document.cookie.length>0)
10	{
11	c_start=document.cookie.indexOf(c_name + "=");
12	if (c_start!=-1)
13		{ 
14		c_start=c_start + c_name.length+1; 
15		c_end=document.cookie.indexOf(";",c_start);
16		if (c_end==-1) c_end=document.cookie.length;
17		return unescape(document.cookie.substring(c_start,c_end));
18		} 
19	}
20	return "";
21}	
22
23function setBadBrowser(c_name,value,expiredays)
24{
25	var exdate=new Date();
26	exdate.setDate(exdate.getDate()+expiredays);
27	document.cookie=c_name+ "=" +escape(value) + ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
28}
29
30if(badBrowser() && getBadBrowser('browserWarning') != 'seen' ){
31	$(function(){
32		$("<div id='browserWarning'>You are using an unsafe & outdated browser. Please update to <a href='http://getfirefox.com'>FireFox</a>, <a href='http://www.opera.com/download/'>Opera</a>, <a href='http://www.apple.com/safari/'>Safari</a> or <a href='http://www.microsoft.com/windows/downloads/ie/getitnow.mspx'>Internet Explorer 7</a>. Thanks!&nbsp;&nbsp;&nbsp;[<a href='#' id='warningClose'>close</a>] </div> ")
33			.css({
34				backgroundColor: '#ef3e26',
35				'width': '100%',
36				'border-top': 'solid 1px #000',
37				'border-bottom': 'solid 1px #000',
38				'text-align': 'center',
39				'color': '#ffffff',
40				padding:'10px 0px 10px 0px'
41			})
42			.prependTo("body");
43		
44		$('#warningClose').click(function(){
45			setBadBrowser('browserWarning','seen');
46			$('#browserWarning').slideUp('slow');
47			return false;
48		});
49	});	
50}