I can't make a button linnk to a url

i have been trying all day and i just can’t do it. I have made a button in flash with a picture and a button rollover thing and I am trying to make it link to the html pages i am in the process of making - thing is at the moment i can’t even get it to link to google or yahoo as a test run the script i am inserting has been

on(release) {getURL(www.google.co.uk,_blank)}

or

getURL(http://www.google.co.uk)

and many other variations the error panel either says its missing a ‘,’ or a ‘)’

or

/Users/andypoole/Desktop/dandpweb/images/undefined

but seen as i am not linking it to an image undefined i can’t work it out!!

please help me!!