Get diff years from 2 dates

window.ftGetDiffYears(fldIDFrom, fieldIDTo, format);
This JS function will allow you to find the difference between 2 dates -in years.
* Please note: The permitted formats for date are:
"dd/mm/yyyy'
"mm/dd/yyyy"
"yyyy-mm-dd"

For example:
window.ftGetDiffYears('fld3','fld5','dd/mm/yyyy');
The above code will calculate the difference in years between field fld3 and fld5.