document.write("<div id='qqfd' style='position:absolute;top:50px;left:0px;z-index:1000px;'>"); 
document.write("<div id='gubaiqq'>");
document.write("<div style='background:url(JS/qq/up_001.gif); width:118px; height:55px;' onclick=\"aaa();\"></div>");
document.write("<div style='background:url(JS/qq/mid001.gif); width:118px; text-align:center; margin-top:-10px;'>");
document.write("<div style=' width:118px; text-align:center;'>");

document.write('<div style="margin-top:5px;"><a target="_blank" rel="nofollow" href="http://wpa.qq.com/msgrd?v=3&amp;uin=1156795218&amp;site=qq&amp;menu=yes"><img alt="QQ:点击咨询" border="0" src="http://wpa.qq.com/pa?p=2:1156795218:41" /></a></div>');

document.write("</div></div>");
document.write("<div style='background:url(JS/qq/bot_001.gif); width:118px; height:21px;'></div>");
document.write("</div> <br /><img src='/images/erweima.png' width='115' /></div>");

function aaa(){
var _windowScrollTop = jQuery(window).scrollTop();  //获取当前滚动条高度   
$("#qqfd").animate({top:_windowScrollTop+50},0);   
} 
window.onscroll=aaa;