83822 set Homepage

You know the javascript that asks "Would you like to set your homepage to [login to view URL]" when you click a hyperlink. Then a popup window appears and you have to choose Yes or No. I would like a (java?)script that automatically sets the homepage of my visitors to my URL. Example: a visitor to [login to view URL] has his homepage set to [login to view URL] but when he visits my website, his homepage is automatically changed to [login to view URL] without asking! Some adult websites do this and I noticed [login to view URL] does this, too. Please note that (IMHO) there is no javascript visible in the source code (otherwise I would not be asking for quotations :-). I'm looking for the same as [login to view URL], not something I have to put in my source code and where everyone can grab it.