Calculate the numeric differential between two date fields and display in in a third field

Unfortunately, I am unable to share -- the delayed response was awaiting permission. Suffice it to say, my attempts to make lemondade from the bushel of lemons dumped on my lap is not panning out. :S

My starting point was attempting to use the following scripts obtained from these forums:
var sDate1= this.getField("Date_Start_Actual").value;
var sDate2= this.getField("Date_Start_Contract").value;
var oDate1 = util.scand("ddmmmyy", sDate1);
var oDate2 = util.scand("ddmmmyy", sDate2);
var nDay = 1000 * 60 * 60 * 24;
var eDays = Math.abs(1+((oDate2-oDate1)/nDay));
if (sDate1 && sDate2) && (sDate1 != sDate2) {
event.value = Math.round(eDays);
} else if (sDate1 && sDate2) && (sDate1 == sDate2) {
event.value = "1";
else {
event.value = "";

and 

var theColor = color.black;
if (event.value < 0) {
theColor = color.red;
}
else if (event.value < 10) {
theColor = color.yellow;
}
else {
theColor = color.black;
}

event.target.fillColor = theColor;

I have about a half dozen other scripts also from these forums that I've attempted to add in whole or in part and haven't been able to get past the "Syntax Error" to test -- unlike the two above.  Folks have now come to prefer the fillable acrobat forms vice the spreadsheets we've been using but they are demanding more and more functionality.