Convert integer to binary or hexadecimal, and the other way.

numeric-convert.js

function dec2bin(number) {
  return number.toString(2);
}

function bin2dec(number) {
    return parseInt(number, 2);
}

function dec2hex(number) {
  return number.toString(16);
}

function hex2dec(number) {
    return parseInt(number,16);
}