asyncify.js

function asyncify(fn) {
  var orig_fn = fn,
      intv = setTimeout(function() {
        intv = null
        if (fn) fn()
      }, 0)
  
  fn = null
  
  return function() {
     if (intv) {
       fn = orig_fn.bind.apply(orig_fn, [this].concat([].slice.call(arguments)))
     } else {
       orig_fn.apply(this, arguments)
     }
  }
}