/*!
 * get-scrollmax-y.js | MIT (c) Shinnosuke Watanabe
 * https://github.com/shinnn/get-scrollmax-y.js
*/
!function() {
'use strict';

var getScrollMaxY;

if (typeof window.scrollMaxY === 'number') {
  getScrollMaxY = function()  {return window.scrollMaxY};
} else {
  var body = document.body, html = document.documentElement;

  var getInnerHeight;

  if (typeof window.innerHeight === 'number') {
    getInnerHeight = function()  {return window.innerHeight};
  } else {
    getInnerHeight = function()  {return html.clientHeight || body.clientHeight};
  }

  var getScrollHeight = function()  {return Math.max(
    body.scrollHeight,
    body.offsetHeight,
    html.clientHeight,
    html.scrollHeight
  )};

  getScrollMaxY = function()  {return getScrollHeight() - getInnerHeight()};
}

window.getScrollMaxY = getScrollMaxY;
}();