Compare Two Dates in Javascript

CompareDates.js

// create Javascript Date Object of Date entered
var OrderFor = new Date(NewSubmission["Month"] + " " + NewSubmission["Day"] + ", " + NewSubmission["Year"]); 
var Submitted = new Date(e.values[0]);

// milliseconds between two dates divided by milliseconds in a day, rounded down
var Notice = Math.floor((OrderFor.getTime() - Submitted.getTime()) / (1000 * 60 * 60 * 24));