Filter example

gistfile1.js

var elemsToKeep = [1, 3, 5, 6, 8];

var arr=[];
arr[0] = 'one1';
arr[1] = 'two2';    // remove
arr[2] = 'three3';
arr[3] = 'four4';    // remove
arr[4] = 'five5';
arr[5] = 'six6';
arr[6] = 'seven7';    // remove
arr[7] = 'eight8';
arr[8] = 'nine9';    // remove
arr[9] = 'ten0';   // remove

function keep(element, index, array) {
  var num = parseInt(element.replace(/[^\d]/g,''),10)
  return elemsToKeep.indexOf(num) !=-1;
}
  var filtered = arr.filter(keep);
    
    alert(filtered)