Check browser support for CSS3 transitions

supportTransitions

    supportsTransitions = ->
      docBody = document.body or document.documentElement
      styles = docBody.style
      prop = "transition"
      return true  if typeof styles[prop] is "string"

      # Tests for vendor specific prop
      vendor = ["Moz", "Webkit", "Khtml", "O", "ms"]
      prop = prop.charAt(0).toUpperCase() + prop.substr(1)
      i = undefined
      i = 0
      while i < vendor.length
        return true  if typeof styles[vendor[i] + prop] is "string"
        i++
      false