Here's a topical one for you. I was just about to implement a cookie-acceptance form on a Domino website that I look after for a customer when I thought I'd check it in IE (as all good developers should) first. Just because. You know. Even the simplest of changes aren't bound to work in IE.

And it's good job I did check too as my code worked in all browsers other than IE!! Typical.

My code was in a field on a Domino-based form. User's are given the option to "accept cookie use" by pressing a button. This POSTs the form back to the server, where a cookie is set to say they've accepted and it won't then ask them again.

The code in the field on the form looked like this:

cookieName:="ACMECookiesAccepted";
cookieValue:="TRUE";
cookieDomain:= "."+@Right(Server_Name ; ".");
maxAge:=@Text(60*60*24*7*52*2);
result:=cookieName + "="+cookieValue + "; Domain="+cookieDomain  + "; Path=/; Max-Age=" + maxAge;

@SetHTTPHeader("Set-Cookie"; result)

This sets a cookie that lasts for two years. Well, at least it does in most browsers. It turns our IE doesn't support the use of max-age. IE only accepts works with the (deprecated) "Expires" value, which has to be in a very specific GMT-based date format (like "Thu, 31-May-2012 14:37:12 GMT"). Damn it!

The code needed modifying to this:

expiresDate:=@Adjust(@Now; 2; 0; 0; 0; 0; 0);

expiresDateDayName:= @Replace(
        @Text(@Weekday(expiresDate)); 
        "1":"2":"3":"4":"5":"6":"7"; 
        "Sun":"Mon":"Tue":"Wed":"Thu":"Fri":"Sat"
);

expiresDateDay:=@Day(expiresDate);

expiresDateMonthName:= @Replace(
        @Text(@Month(expiresDate)); 
        "1":"2":"3":"4":"5":"6":"7":"8":"9":"10":"11":"12"; 
        "Jan":"Feb":"Mar":"Apr":"May":"Jun":"Jul":"Aug":"Sep":"Oct":"Nov":"Dec"
);

expiresDateGMT:=  expiresDateDayName + ", "+ @If(expiresDateDay<10; "0";"") +
        @Text(expiresDateDay) + " " + expiresDateMonthName + " " + @Text(@Year(ExpiresDate)) + " 23:59:59 GMT";

cookieName:="ACMECookiesAccepted";
cookieValue:="TRUE";
cookieDomain:= "."+@Right(Server_Name ; ".");
cookieMaxAge:= @Text(60*60*24*7*52*2);
result:=cookieName + "=" + cookieValue + "; Expires="+ expiresDateGMT + "; Domain="+cookieDomain  + "; Path=/; Max-Age=" + cookieMaxAge;

@SetHTTPHeader("Set-Cookie"; result)

Bloody IE!