Need help writing time difference, date difference, and if/then formulas

Thank you for linking these tutorials, but I am such a beginner that I do not understand how to use these codes for what I need. Unfortunately, I do not have the authority to pay someone to write the code, either. Do you know of a good course that teaches basics for javascript in pdfs? I have seen so many for building websites, but that is not my goal.

Thanks!

Yes, of course! I have been able to use javascript before but this is far more complicated than I am used to doing, and I can't seem to find the error in the formulas I have tried.

First, I need to calculate the hours being worked each day and total it in the contracted hours box. So I created a hidden text box to calculate that time for each day and have tried to include this formula for only MondayStartTime and MondayEndTime:

function dateTimeDiffer(startDTime, endDtime){

               var startTime = new Date(TimeStartMonday);

               var endTime = new Date(TimeEndMonday);

               var diff = endTime.getTime(TimeEndMonday) - startTime.getTime(TimeStartMonday);

               var msec = diff;

               var hh = Math.floor(msec / 1000 / 60 / 60);

               msec -= hh * 1000 * 60 * 60;

               var mm = Math.floor(msec / 1000 / 60);

               msec -= mm * 1000 * 60;

               return hh + “:” + mm + “:”;

}

Second, I need the amount totaled in contracted hours to equal a percentage based on what is entered:

<20 = 45%

21-30 = 50%

31-38 = 55%

>39 = 60%

This is what I have tried so far. (The giant spacing only applied itself when I copied it into this forum).

var n = this.getField("ContractedHours").value;

 if (n < 20) {

    event.value = "45";

}

else if (n >= 21 && n <31 ) {

    event.value = "50";

}

else if (n >= 31 && n < 39) {

    event.value = "55";

}

else if (n >= 39) {

    event.value = "60";

}

Next, I need to add 1% for each "Yes" that is checked. This is the formula I tried to use:

function myFunction() {

  var checkBox = document.getElementById("Check Box7");

  var text = document.getElementById("Text21");

  if (checkBox.checked == true){

    text.style.display = "block";

  } else {

text.style.display = "none";

  }

Last, I need to calculate longevity with the organization based on the hire date compared to the effective date (4/1/2019). If the years equal 5 to 9, they receive an additional percent. 10 or more, they receive 2%. I realize that this is two different formulas and in two different boxes. I do not have a formula for the second part of the process.

1. if ( not DateTimeField2.isNull ) then 
2.     var startDate = Date2Num( DateTimeField2, "YYYY-MM-DD" ) 
3.     var currentDate = Date() 
4.  
5.     var years = ( currentDate - startDate ) / 365 
6.     $ = Floor( years ) 
7. else 
8.     $ = "" 
9. endif 

Thank you for any help you are able to provide. I have tried to figure this out myself but this complex javascript is not clicking for me.