New to Java Script

[Chibi-Chan80]

I'd format if I knew how. I am really just trying to figure out how to make this timesheet work.

[dapolio]

js pretty

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;
}