// TODO document this user agent function
var labelType, useGradients, nativeTextSupport, animate
;(function () {
  var ua = navigator.userAgent,
    iStuff = ua.match(/iPhone/i) || ua.match(/iPad/i),
    typeOfCanvas = typeof HTMLCanvasElement,
    nativeCanvasSupport = (typeOfCanvas == 'object' || typeOfCanvas == 'function'),
    textSupport = nativeCanvasSupport && (typeof document.createElement('canvas').getContext('2d').fillText == 'function')
  // I'm setting this based on the fact that ExCanvas provides text support for IE
  // and that as of today iPhone/iPad current text support is lame
  labelType = (!nativeCanvasSupport || (textSupport && !iStuff)) ? 'Native' : 'HTML'
  nativeTextSupport = labelType == 'Native'
  useGradients = nativeCanvasSupport
  animate = !(iStuff || !nativeCanvasSupport)
})()