Get Day Delta

gistfile1.js

function getDayDelta(incomingYear,incomingMonth,incomingDay){
    var incomingDate = new Date(incomingYear,incomingMonth-1,incomingDay),
      today = new Date(), delta;
    // EDIT: Set time portion of date to 0:00:00.000
    // to match time portion of 'incomingDate'
    today.setHours(0);
    today.setMinutes(0);
    today.setSeconds(0);
    today.setMilliseconds(0);

    // Remove the time offset of the current date
    today.setHours(0);
    today.setMinutes(0);

    delta = today - incomingDate;

    return Math.round(delta / 1000 / 60 / 60/ 24);
}