/*
 *设置顶栏的浮动效果
 */
if(window.top.attachEvent){
	window.attachEvent("onload",initFloatTips);
	}else{
		window.top.addEventListener("load",initFloatTips,false);
	}
var tips;
var theTop =0/*这是默认高度,越大越往下*/; 
var old = theTop;
var pos;

function initFloatTips() {
  tips = document.getElementById('top');
  tips.style.top = 0+ "px";//设置初始时的高度
  moveTips();  
};
function moveTips() {
  var tt=50;

  if ((window.top.document.documentElement != null) && (window.top.document.documentElement.scrollTop != 0)) {
    pos = window.top.document.documentElement.scrollTop;
  } else if (window.top.document.body) {
    pos = window.top.document.body.scrollTop;
  }else if (window.top.innerHeight) {
    pos =theTop;
  } 

  //pos=pos-tips.offsetTop+theTop;
  //pos=tips.offsetTop+pos/4;

  if (pos < theTop) pos = theTop;
  if (pos != old) {
    tips.style.top = pos+"px";
  //  if(pos > 120){
  //  	tips.style.top = pos - 173 + "px";
  //  }
  //  tt=10;
  }
  old = pos;
  setTimeout(moveTips,tt);
}