Ok i've finally got a working version, I included the 4 checks to ensure that the google clicks are recorded and not doubled up. It could technically still double up on really slow connections, But it seems to work in testing.

So here's the answer that 3 people have told me you can't do.

var adview = Titanium.UI.createWebView({
backgroundColor:'white',
width:320,bottom:0,
height:50,url:'ad.html'});
win2.add(adview);
var url1 = "";
var url2 = "";
var url3 = "";
interval = setInterval(watchFrame, 300);
function watchFrame(){
if (
(adview.url!="file:///android_asset/Resources/ad.html")
&&(adview.url!="ad.html")){
     url3=url2;
     url2=url1;
     url1=adview.url;
     if((url3==url2)&&(url2==url1))
{adview.url="ad.html";Titanium.Platform.openURL(url1);}
}
}