var currentTime = new Date();
var year = currentTime.getFullYear();
var yearplussone = year+1;
var yearplusstwo = year+2;
var yearplussthree = year+3;
var yearplussfour = year+4;
var yearplussfive = year+5;
document.write('<option>'+year+'</option>');
document.write('<option>'+yearplussone+'</option>');
document.write('<option>'+yearplusstwo+'</option>');
document.write('<option>'+yearplussthree+'</option>');
document.write('<option>'+yearplussfour+'</option>');
document.write('<option>'+yearplussfive+'</option>');