Question: IS there a way to add/subtract time from a start time and add/subtract time from an end time in one cell.

This is a time sheet. My boss would like to account for travel for our workers. IF you show up at 10:00 pm. he would want me to enter 10:00 pm, but the excel to show 9:30 pm. And if you left at 11:00 pm, he would want me to enter 11:00 pm, but it show 11:30 pm.

I believe this is a macro, but I am not very educated when it comes to macros.

Answer: 
A classic JavaScript line should just do the job:

document.getElementById('processorTitle').innerHTML=' new text ';
Assuming you are including the jQuery library which isn't included in your code snippet, but inferred based on your first attempt:

`$("#processorTitle").html("test");`