Another Calculation Question

Hello All, 

I am working on a timesheet that has In/Out In/Out and am having NaN errors with my code. This is the first time I've tried this so I am going at it blind. 

The DOCUMENT JavScript is:

function Time2Num(sFormat, sTime) {

if(sTime == '') return ''; // exit

// get date time for Epoch date and sTime

var oTime = util.scand('mm/dd/yyyy ' + sFormat, '01/01/1970 ' + sTime);

// convert UTC Offset to milliseonds for adjustment

var fTZOffset = oTime.getTimezoneOffset() * 1000 * 60

// time since the start of the day in millseconds

var fTime = oTime.valueOf() - fTZOffset;

// convert to seconds and return value

return Math.round(fTime / 1000);

}

function TimeDiff(cStartField, cEndField) {

var sTimeFormat = 'hh:mm';

var fDiff = 0;

// get the start time

var sStart = this.getField(cStartField).value;

// get the end time

var sEnd = this.getField(cEndField).value;

// complete script only if we have data

if(sStart != '' & sEnd != '') {

// convert sStart string to seconds

var fStart = Time2Num(sTimeFormat, sStart);

// convert sEnd string to seconds

var fEnd = Time2Num(sTimeFormat, sEnd);

if (fEnd<fStart) fEnd+=86400;

// compute difference in seconds

fDiff += fEnd - fStart;

}

return fDiff;

}

The NaN error is showing with this custom calculation script:

var start = this.getField("InSunday").value;
var finish = this.getField("OutSunday_2").value;
if (start=="" || finish=="") event.value = "";
else {
var lunchout = this.getField("OutSunday").value;
var lunchin = this.getField("InSunday_2").value;
var startArr = start.split(":");
var finishArr = finish.split(":");
var hourWDiff = Math.abs(finishArr[0] - startArr[0]);
var minWDiff = (Math.abs(finishArr[1] - startArr[1])/60*100);
var hourLDiff = 0;
var minLDiff = 0;
if (lunchout!="" && lunchin!="") {
var lunchoutArr = lunchout.split(":");
var lunchinArr = lunchin.split(":");
hourLDiff = Math.abs(lunchoutArr[0] - lunchinArr[0]);
minLDiff = (Math.abs(lunchoutArr[1] - lunchinArr[1])/60*100);
}
var totalHrs = hourWDiff + (minWDiff/60) + hourLDiff + (minLDiff/60);
event.value = totalHrs;
}

Any help would be appreciated! 

[Question moved to the Acrobat forum by moderator]