Sorry Marc, I had turned debug to true but I didn't know how view the errors.... (I know nothing about jquery) So, worked out how to view it in the browser and I was getting an error missing } after property list. Doh, if you look above, I have omitted a comma after childColumn.
And now it works :-) Thanks for you persistence in helping me - really appreciate it.
And now it works :-) Thanks for you persistence in helping me - really appreciate it.