document.write("<div id='gotop'><a href='#'>TOP</a></div>");

//<![CDATA[

var tips; var theTop = 164/*这是默认高度,越大越往下*/; var old = theTop;

function initFloatTips() {

tips = document.getElementById('gotop');

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;

//alert(tips.style.top);

}



old = pos;

setTimeout(moveTips,tt);

}

//!]]>

initFloatTips();