<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
<script type="text/javascript" src="https://github.com/carhartl/jquery-cookie/raw/master/jquery.cookie.js"></script>
<script type="text/javascript">
$(document).ready(function() {
if( $.cookie('showOnlyOne') ){
//it is still within the day
//hide the div
$('#shownOnlyOnceADay').hide();
} else {
//either cookie already expired, or user never visit the site
//create the cookie
$.cookie('showOnlyOne', 'showOnlyOne', { expires: 1 });
//and display the div
$('#shownOnlyOnceADay').show();
}
});
</script>
</head>
<body>
<div id="shownOnlyOnceADay">
This text should only be shown once a day!
</div>
</body>
</html>