function insert_commas(total_string,num_len) {
//CALCULATE POSITION OF COMMAS IN STRING IN FOR DISPLAYING CURRENCY FIGURES ON A WEB PAGE

switch (num_len) 
{ 
case 4:
part_a = total_string.substring(0,1);
part_b = total_string.substring(1,4);
total_part_display="$"+ part_a + "," + part_b;
total_display = total_part_display.toString();
return total_display;
break;

case 5:
part_a = total_string.substring(0,2);
part_b = total_string.substring(2,5);
total_part_display="$"+ part_a + "," + part_b;
total_display = total_part_display.toString();
return total_display;
break;

case 6:
part_a = total_string.substring(0,3);
part_b = total_string.substring(3,6);
total_part_display="$"+ part_a + "," + part_b;
total_display = total_part_display.toString();
return total_display;
break;

case 7:
part_a = total_string.substring(0,1);
part_b = total_string.substring(1,4);
part_c = total_string.substring(4,7);
total_part_display="$"+ part_a + "," + part_b + "," + part_c;
total_display = total_part_display.toString();
return total_display;
break;

case 8:
part_a = total_string.substring(0,2);
part_b = total_string.substring(2,5);
part_c = total_string.substring(5,8);
total_part_display="$"+ part_a + "," + part_b + "," + part_c;
total_display = total_part_display.toString();
return total_display;
break;

case 9:
part_a = total_string.substring(0,3);
part_b = total_string.substring(3,6);
part_c = total_string.substring(6,9);
total_part_display="$"+ part_a + "," + part_b + "," + part_c;
total_display = total_part_display.toString();
return total_display;
break;

case 10:
part_a = total_string.substring(0,1);
part_b = total_string.substring(1,4);
part_c = total_string.substring(4,7);
part_d = total_string.substring(7,10);
total_part_display="$"+ part_a + "," + part_b + "," + part_c  + "," + part_d;
total_display = total_part_display.toString();
return total_display;
break;

case 11:
part_a = total_string.substring(0,2);
part_b = total_string.substring(2,5);
part_c = total_string.substring(5,8);
part_d = total_string.substring(8,11);
total_part_display="$"+ part_a + "," + part_b + "," + part_c  + "," + part_d;
total_display = total_part_display.toString();
return total_display;
break;

case 12:
part_a = total_string.substring(0,3);
part_b = total_string.substring(3,6);
part_c = total_string.substring(6,9);
part_d = total_string.substring(9,12);
total_part_display="$"+ part_a + "," + part_b + "," + part_c  + "," + part_d;
total_display = total_part_display.toString();
return total_display;
break;

case 13:
part_a = total_string.substring(0,1);
part_b = total_string.substring(1,4);
part_c = total_string.substring(4,7);
part_d = total_string.substring(7,10);
part_e = total_string.substring(10,13);
total_part_display="$"+ part_a + "," + part_b + "," + part_c  + "," + part_d + "," + part_e;
total_display = total_part_display.toString();
return total_display;
break;

case 14:
part_a = total_string.substring(0,2);
part_b = total_string.substring(2,5);
part_c = total_string.substring(5,8);
part_d = total_string.substring(8,11);
part_e = total_string.substring(11,14);
total_part_display="$"+ part_a + "," + part_b + "," + part_c  + "," + part_d + "," + part_e;
total_display = total_part_display.toString();
return total_display;
break;

case 15:
part_a = total_string.substring(0,3);
part_b = total_string.substring(3,6);
part_c = total_string.substring(6,9);
part_d = total_string.substring(9,12);
part_e = total_string.substring(12,15);
total_part_display="$"+ part_a + "," + part_b + "," + part_c  + "," + part_d + "," + part_e;
total_display = total_part_display.toString();
return total_display;

}

} // insertCommas()