update_years_of_experience_for_employee.js

//Getting employee form entries
//Replace your form and field link name if needed
for each employee in Employee[dateofhire != null]
{
	//Calculating Years of Service
	from_year = employee.dateofhire.getYear();
	to_year = zoho.currenttime.getYear();
	service_year = to_year - from_year;
	//Updating Years of Service
	employee.yearsofservice = service_year;
}