gistfile1.coffee

swap = ->
  inputVar = parseInt document.getElementById('userInput').value
  
  return undefined unless inputVar?
  output.innerHTML = ''
  
  inputVar *= -1 if inputVar < 0
  
  copy = inputVar
  count = 1

  count++ while parseInt(copy /= 10) > 0
  
  for i in [0..count]
    temp = parseInt inputVar / power 10, i
    temp2 = 10 * parseInt inputVar / power 10, i + 1
    output.innerHTML += temp - temp2

power = (base, pow) ->
  out = 1
  negative = pow < 0
  pow *= -1 if negative
  
  for i in [0..pow]
    if negative
      out /= base
    else
      out *= base
  out