I am working with this snippet of code and having problems because I don't understand the syntax. Could someone help me with this? I need to separate the hours variable into hours and minutes an then I need to turn that into a concatenated string.

2. function updateDistances(item) {
3. try {
4. var prev = $($(item).prevAll('li:not(.show_placeholder):first'));
6. if (prev != undefined && !$(prev).hasClass('temp_placeholder')) {
7. calcRoute(prev, $(item));
8. }
9. } catch(e) {
10. log(e);
11. }
13. try {
14. var next = $($(item).nextAll('li:not(.show_placeholder):first'));
15. if (next == undefined || $(next).hasClass('temp_placeholder')) {
16. $($(item).find('span.drive_time')[0]).text(hours.toString().substring(0, 4) + ' h' + ' :' + ' m');
19. $($(item).find('span.drive_miles')[0]).text('0.0 mi');
20. $(item).find('select.transfer').val('');
21. } else {
22. calcRoute($(item), next);
23. }
24. } catch(e) {
25. log(e);
26. }
27. }