Deleting a cookie

[Jon12345]

I have a page that sets a cookie as follows:

[code]<?
setcookie("user",$user,time()+100000000000);
?> [/code]

But if a cookie is already set, I want to change the value of user to something else.

How can I do that? Should I delete it and write it again? Or can I somehow just change the cookies user variable?

Thanks,

Jon

[michaellunsford]

if you set the cookie again, it should overwrite the previous value.