cookie script sought

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Hi
Im building a kids -not-4-profit site and looking for a jvascript cookies that does this:

recognises the person and writes welcome + name+ to the page

Has a bit that says if this is not + name+ click here to reload page

then has a prompt asking for the name

also recognises the visitor from before etc...

can you suggest where i might find a script?

thanks
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I'll try (to modify) but just starting out with js.

thanks again
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