Make homepage Link Problems

I try to make a link thats said, “Make this your homepage” but I tryed it, but it never shows up or When I click on it, it makes it ato, but I want it, so when you click on it, it will ask you “Do you want to make [url]http://www..com[/url] your home page?”

If you know the code or anything let me know ? ? ? ? ? ?
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