getURL - want it to work outside of same domain


I’ve got a problem with getURL, it works fine tested locally.

_root.cb_mc.url_mc.onRelease = function() {
getURL(“”, “_blank”);

However when testing from the hosting server a new window opens fine but the index URL is added in front of the target URL, like so:

and as the link functions as a relative link to the main site rather than an external absolute URL, it doesn’t work!

Any ideas how to fix this?
I have added to the index HTML “allowScriptAccess” value=“always”.