Send you the coding? Not sure what you mean...
Javascript is an interpretaed language that is executed on the client, which means no direct contact with the server. It's very easy to manipulate a javascript on a site (or really, you can only manipulate the copy of the site in your browser cache.).
Try searching google for "DHTML Reference" then you'll find Microsoft's Reference materials, Javascript (or rather Microsofts version called JScript) is also there. You could also try searching on Netscapes sites which first came up with the language.