phpjs/functions/array/array_fill.js

php.js offers community built php functions in javascript

function array_fill(start_index, num, mixed_val) {
  //  discuss at: http://phpjs.org/functions/array_fill/
  // original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // improved by: Waldo Malqui Silva
  //   example 1: array_fill(5, 6, 'banana');
  //   returns 1: { 5: 'banana', 6: 'banana', 7: 'banana', 8: 'banana', 9: 'banana', 10: 'banana' }

  var key, tmp_arr = {};

  if (!isNaN(start_index) && !isNaN(num)) {
    for (key = 0; key < num; key++) {
      tmp_arr[(key + start_index)] = mixed_val;
    }
  }

  return tmp_arr;
}