coding help

[ricky_vancouver]

The code below is part of a working program which inserts "tentpay" and date paid. I'm trying to add the code which is below the comment line(//*). It does nothing? can someone look at it?

 

 

 

 

function calculate_paid(v)

{

var rentdue = document.getElementById("rentdue");

var prevbal = document.getElementById("prevbal");

var misc = document.getElementById("misc");

var late = document.getElementById("late");

var amtpaid = document.getElementById("amtpaid");

var tentpay = document.getElementById("tentpay");

var hudpay = document.getElementById("hudpay");

var datepaid = document.getElementById("datepaid");

var late = document.getElementById("late");

var dateNow = new Date();

var dayNow = dateNow.getDate();

var datePaid = (dateNow.getMonth()+1)+"/"+dateNow.getDate()+"/"+dateNow.getFullYear();

switch(v)

{

  case amtpaid:

  var tpay = amtpaid.value - hudpay.value;

  if(tpay >= 0){tentpay.value = tpay;}

  if(amtpaid.value > 0){datepaid.value = datePaid;}

  break;

  case tentpay:

  if(!hudpay.value || hudpay.value == " "){hudpay.value = 0;}

  if(!tentpay.value || tentpay.value == " "){tentpay.value = 0;tentpay.select();}

  amtpaid.value = parseInt(tentpay.value) + parseInt(hudpay.value);

  if(tentpay.value > 0){datepaid.value = datePaid;}

  break;

  case hudpay:

  if(!tentpay.value || tentpay.value == " "){tentpay.value = 0;}

  if(!hudpay.value || hudpay.value == " "){hudpay.value = 0;hudpay.select();}

  amtpaid.value = parseInt(tentpay.value) + parseInt(hudpay.value);

  if(hudpay.value > 0){datepaid.value = datePaid;}

  break;

//*

  case prevbal:

  var balance = parseInt(rentdue.value) + parseInt(prevbal.value) + parseInt(misc.value) - parseInt(hudpay.value);

  if(amtpaid.value < balance.value){

  prevbal.value = parseInt(balance.value) - parseInt(amtpaid.value);}

  if(dayNow.value > 5){late.value = "L";

  prevbal.value = prevbal.value + 10;}

  break;

  }

    }