dom ready function for modern browsers

domReady.js

function domReady (callback) {
  function handler () {
    document.removeEventListener('DOMContentLoaded', handler, false)
    window.removeEventListener('load', handler, false)
    callback() // may pass parent context here
  }
  document.addEventListener('DOMContentLoaded', handler, false)
  window.addEventListener('load', handler, false)
}