Calculate bearing / heading from point A to point b if given latitude and longatude for 2 points

Background: I have an ASP web program that generated a document I use when I am flying. User inputs departure airport code and arrival airport code and data is pulled from a database for the trip. You can test the program at [login to view URL] Here are some airport codes you can use for testing KSEP, KXBP, KADM, KDTO, F44, 52F <- those are airport identifiers. Enter 2 different ones in each box provided and click “get data” to see the data come back Click “Generate Kneeboard” to see the MS word document generated I need this fixed: Calculate the heading a. There is a function that exists in the program in the [login to view URL] and in the [login to view URL] pages that does not work. b. I need a function that will take in Latitude and longitude for 2 points (meaning 2 airports) and return the direct heading. i. The heading should be within a degree or 2 of [login to view URL] ii. Meaning if in my program you type KDTO to KSEP the heading will match this [login to view URL],-98.17767333477677&chart=301&zoom=3&plan=[login to view URL]:[login to view URL] The current functions in both pages are not correct and need to be replaced with functions that are correct. website is: [login to view URL]