Sort Array method sorts all elements in array

//Example 1: Sort Method applied to strings//Declare of Array        var objArray = new Array(6);

objArray[0] = "Dreams";
objArray[1] = "On";
objArray[2] = "Fire";
objArray[3] = "Higher";
objArray[4] = "And";
objArray[5] = "Higher";

//Reverse all elements using sort() method.var MyFavSong = objArray.sort();

//Output of sort method stored in MyFavSong string
And,Dreams,Fire,Higher,Higher,On


//Example 2: Sort Method applied to numbers//Declare of Array        var objArrayNum = new Array(6);

objArrayNum[0] = 5;
objArrayNum[1] = 2;
objArrayNum[2] = 6;
objArrayNum[3] = 4;
objArrayNum[4] = 1;
objArrayNum[5] = 3;

//Sorts all elements using sort() method.var SortNum = objArrayNum.sort();

//Output of sort method stored in SortNum string
1,2,3,4,5,6


//Testing Sort Method of Arrayfunction TestArray() {
            //Declare of Array        var objArray = new Array(6);

            objArray[0] = "Dreams";
            objArray[1] = "On";
            objArray[2] = "Fire";
            objArray[3] = "Higher";
            objArray[4] = "And";
            objArray[5] = "Higher";

            //Reverse all elements using sort() method.var MyFavSong = objArray.sort();

            //Output of reverse Method
            alert(MyFavSong);
            
            //Declare of Array        var objArrayNum = new Array(6);

            objArrayNum[0] = 5;
            objArrayNum[1] = 2;
            objArrayNum[2] = 6;
            objArrayNum[3] = 4;
            objArrayNum[4] = 1;
            objArrayNum[5] = 3;

            //Sorts all elements using sort() method.var SortNum = objArrayNum.sort();

            //In above statement sort() Method sorts all elements//Output of Sort Number
            alert(SortNum);
    }

Test Sort Method of Array