function make_nav_box(a){nav_box_start();make_opt("Introduction",".",a);make_opt("Day 0","day0.html",a);make_opt("Day 1","day1.html",a);make_opt("Day 2","day2.html",a);make_opt("Day 3","day3.html",a);make_opt("Day 4","day4.html",a);make_opt("Day 5","day5.html",a);make_opt("Day 6","day6.html",a);make_opt("Day 7","day7.html",a);make_opt("Day 8","day8.html",a);make_opt("Day 9","day9.html",a);make_opt("Day 10","day10.html",a);make_opt("GPS","gps.html",a);make_opt("Manifest","manifest.html",a);make_opt("Expenses","expenses.html",a);make_opt("Summary","summary.html",a);nav_box_end()};