//浮动QQ
var tips; 
var theTop = (window.screen.availHeight-document.getElementById('QQFloat').offsetHeight)/2-document.getElementById('QQFloat').offsetHeight/2;/*这是默认高度,越大越往下*/; 
var old = theTop;
function initFloatTips() {
  tips = document.getElementById('QQFloat');
  moveTips();
};
function moveTips() {
  var tt=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";
    tt=10;

  }
 
  old = pos;
  setTimeout(moveTips,tt);
}

function QQClose()
{
    document.getElementById('QQFloat').style.display="none";
}
initFloatTips();