js获取滚动距离的方法

/**

 / THIRD FUNCTION

 * getPageScroll() by quirksmode.com

 *

 * @return Array Return an array with x,y page scroll values.

 */

function ___getPageScroll() {

  var xScroll, yScroll;

  if (self.pageYOffset) {

    yScroll = self.pageYOffset;

    xScroll = self.pageXOffset;

  } else if (document.documentElement && document.documentElement.scrollTop) { // Explorer 6 Strict

    yScroll = document.documentElement.scrollTop;

    xScroll = document.documentElement.scrollLeft;

  } else if (document.body) {// all other Explorers

    yScroll = document.body.scrollTop;

    xScroll = document.body.scrollLeft;  

  }

  arrayPageScroll = new Array(xScroll,yScroll);

  return arrayPageScroll;

};