在cocoa webview中调用网页的Javascript功能

First, I'm a complete newbie at objective-c and cocoa. I've found resources related to this, but none showing what I want, and I can't seem to get the others to work for me. What I need is a really dumbed-down example with a window containing a button and a webview that has an HTML page with a javascript function that takes one parameter (a string or something), and spits it out via First, I'm a complete newbie at objective-c and