How to increment the month?

Hi All,

I am using this code to display the current month in a dynamic text field ( called month) :-

onClipEvent (load) {
now = new Date();
thisMonth = now.getMonth();
month = thisMonth;

}

Now, by converting the numeric into a string it will display the month of Feb ( which is equal to 1).
I need to work out how to show the following month by clicking on a button i.e
on(release){
month = thisMonth++;
}
That button code doesn’t work the way I want it to, anyone have any ideas please

Cheers
SteveD