Ok, to demystify a myth. This is what I put in a movieclip:
PHP Code:
on (release) {
    getURL ("http://www.mapquest.com/directions/main.adp?go=1&do=nw&rmm=1&pn1x=&a1x=&c1x=&s1x=&z1x=&un=m&cl=EN&qq=hltF3hzNT9tNhURP0HLlhh9UYBmHRqyBceg4Gkon14D8uew Lk7pjHQ%253d%253d&ct=NA&rsres=1&1y=US&1ffi=&1l=&1g=&1pl=&1v=&1n=&1pn=&1a=&1c=&1s=&1z=&2y=US&2ffi=&2l=&2g=&2pl=&2v=&2n=&2pn=&2a=194+West+Ashland+Street&2c=doylestown&2s=pa&2z=&r=f", "_blank");
} 
These are my publish settings.

1. It will open a new window when test movie is done.
2. It will do nothing when the html is tested locally on the computer because of security reasons.
3. It will open a new browser window when it is uploaded on the server.


navigateToURL() will not work with these publish settings because it is ActionScript 3 syntax and replaces getURL().