Get weeks of year for given period

getDates

Date.prototype.addDays = function(days) {
    var dat = new Date(this.valueOf());
    dat.setDate(dat.getDate() + days);
    return dat;
};

// Source: http://stackoverflow.com/questions/497790
function convertDate ( d ) {
    // Converts the date in d to a date-object. The input can be:
    //  a date object: returned without modification
    //  an array      : Interpreted as [year,month,day]. NOTE: month is 0-11.
    //  a number     : Interpreted as number of milliseconds since 1 Jan 1970 (a timestamp) 
    //  a string     : Any format supported by the javascript engine, like
    //                  "YYYY/MM/DD", "MM/DD/YYYY", "Jan 31 2009" etc.
    //  an object     : Interpreted as an object with year, month and date attributes.  **NOTE** month is 0-11.
    return (
        d.constructor === Date ? d :
        d.constructor === Array ? new Date(d[0],d[1],d[2]) :
        d.constructor === Number ? new Date(d) :
        d.constructor === String ? new Date(d) :
        typeof d === "object" ? new Date(d.year,d.month,d.date) :
        NaN
    );

}

function getDates(startDate, stopDate) {
    
    var dateArray = [];
    var weekArray = [];
    var currentDate = convertDate(startDate);
    var weekday = new Array(7);
    var weekDayCounter = 1;
    
    weekday[0]=  "Sunday";
    weekday[1] = "Monday";
    weekday[2] = "Tuesday";
    weekday[3] = "Wednesday";
    weekday[4] = "Thursday";
    weekday[5] = "Friday";
    weekday[6] = "Saturday";

    stopDate = convertDate(stopDate);

    while (currentDate <= stopDate) {
        
        if( weekday[currentDate.getDay()] == "Sunday" ) {
            
            weekDayCounter++;
            
        }
        
        dateArray.push({
            'week'  : weekDayCounter,
            'date'  : currentDate
        });
        //currentDate = convertDate(currentDate);
        currentDate = currentDate.addDays(1);//convertDate(currentDate).addDays(1);
        
        //console.log(currentDate);
        

    }
    return {
        'dates': dateArray,
        'weeks': weekDayCounter
    };
}

//getDates('2013-08-01', '2015-10-31');