I'm more for function than form at the moment, so that will due just fine, thanks x.
Note:
If you take your method one step further you can direct users explicitly to the review form as well by adding "&write_review=true" to the end without the quotes.
So using xCepts example with the extension you would end up with
openBrowser("https://play.google.com/store/apps/details?id=com.mycompany.myapp&write_review=true")
This would drop your user off right in-front of the rate it form ready for them to type.
"The greatest trick the devil ever pulled, was to convince the world he didn't exist."