Set a cookie.
$(document).ready(function() {
if ($.cookie('noShowWelcome')) $('.welcome').hide();
else {
$("#close-welcome").click(function() {
$(".welcome").fadeOut(1000);
$.cookie('noShowWelcome', true);
});
}
});
You need to include jQuery.cookie javascript file.
https://raw.githubusercontent.com/carhartl/jquery-cookie/master/src/jquery.cookie.js