The explore tool does show you a sample call when you "Execute" the function. It's not quite cut+paste, but close.
CODE
BrowserPlus.Uploader.upload(
{
url: "/developer/web/code/full_uploader_demo/upload.php",
files: {f0: <filehandle>},
cookies: "hello=world&hi=there"
},
function(){}
);
Hope that helps,
Steve