Dynamic HTML select objects

Want to use JavaScript to remove all elements of a select object? Don't do this:

for (i=0; i < form.yourSelector.length; i++) {
  form.yourSelector.remove(i);
}

...and don't do this either:

l = form.yourSelector.length;
for (i=0; i < l; i++) {
  form.yourSelector.remove(i);
}

Instead, do this:

l = form.yourSelector.length;
for (i=0; i < l; i++) {
  form.yourSelector.remove(form.yourSelector.length - 1);
}

Cookies

Currently having problems deleting cookies set using PHP.

I have a need to set them on one server and to be read by scripts in another server. To do so, I need to apply the top level domain when I set the cookies, otherwise I can't read them when the visitor moves subdomains. But for some reason, I cannot delete the cookie from the other server, even if the domain is specified in exactly the same way.

Perhaps its a security feature and therefore just not possible to do?