Get day in a week

getdayofweek.js

/**
 *
 * @param date Date
 * @param dayOfWeek {Number} between 1 (monday) to 7  (sunday)
 */
var getDayOfWeek = function (date, dayOfWeek) {
    if(dayOfWeek > 7 || dayOfWeek < 1){
        console.warn('dayOfWeek is out of range (1-7), was:', dayOfWeek);
    }
    var _date = new Date(date);
    _date.setDate(_date.getDate() - (_date.getDay() || 7) + dayOfWeek);
    return _date;
};