how to get the number of days with dates of a given week number by using javascript

I want to show them in a loop Having an understanding of javascript & jQuery.

I have done to get the week number in a loop by using this code, for now, I want to get all days with dates of the given week number

        function printWeekNumber() { 
            var dateFrom =  
                document.getElementById("txtFrom").value; 
            var dateF = new Date(dateFrom); 
            var resultFrom = dateF.getWeekNumber(); 
 Date.prototype.getWeekNumber = function() { 

            var oneJan =  
                new Date(this.getFullYear(), 0, 1); 

            // calculating number of days  
            //in given year before given date 

            var numberOfDays =  
                Math.floor((this - oneJan) / (24 * 60 * 60 * 1000)); 

            // adding 1 since this.getDay() 
            //returns value starting from 0 

            return Math.ceil((this.getDay() + 1 + numberOfDays) / 7); 

        } 

        function printWeekNumber() { 
            var dateFrom =  
                document.getElementById("txtFrom").value; 
            var dateF = new Date(dateFrom); 
            var resultFrom = dateF.getWeekNumber(); 

            var dateTo =  
                document.getElementById("txtTo").value; 
            var dateT = new Date(dateTo); 
            var resultTo = dateT.getWeekNumber();

            for (var i = resultFrom; i <= resultTo; i++) {
              alert(i);
            }

        } 

Please help me i am stuck in this step.