About Browser's Cookie

You may use a cookie with a timestamp

showmessage = getCookie('alertbox_12_12_2011');
if(!showmessage){
   //show the message
}
onclosemessage = function(){
    //close box here
   setCookie('alertbox_12_12_2011',1,1);
}

Hope you get the idea.

You can use this getCookie and setCookie function

revaxarts said
You may use a cookie with a timestamp

showmessage = getCookie('alertbox_12_12_2011');
if(!showmessage){
   //show the message
}
onclosemessage = function(){
    //close box here
   setCookie('alertbox_12_12_2011',1,1);
}

Hope you get the idea.

You can use this getCookie and setCookie function

+1

You need some hash system to diferentiate cookies for each message. This one won’t work if there are more than 1 message per day, but you get the idea I hope

Also, it will be good to keep a list of messages somewhere and delete cookies which are not used anymore. Better solution will be to use JSON and pack all the data in 1 cookie and display only the latest message or something similar.

there’s no need to store multiple values/cookies, just use one and save timestamp of last message edit.

hide the box if cookie exists and saved timestamp == message, show it and set the cookie if not.

crc32 of message content would also work.

BF

If the cookie expires after 1 day and you don’t have too many messages you don’t have to delete them explicitly. If you have a couple of messages I would go with pixelentitys approach.