var tips;
var theTop = 100;/*这是默认高度,越大越往下*/;
var old = theTop;
function initFloatTips() {
  tips = document.getElementById('floatTips');
  moveTips();
};
function moveTips() {
  var timers=50;
  if (window.innerHeight) {
    pos = window.pageYOffset;
  }else if (document.documentElement && document.documentElement.scrollTop) {
    pos = document.documentElement.scrollTop;
  }else if (document.body) {
    pos = document.body.scrollTop;
  }
  pos=pos-tips.offsetTop+theTop;
  pos=tips.offsetTop+pos/10;
  if (pos < theTop) {
    pos = theTop;
  }
  if (pos != old) {
    tips.style.top = pos+"px";
    timers=10;
  }
  old = pos;
  window.setTimeout(moveTips,timers);
}
initFloatTips();