document.write("");
var default_top_ps=50;
var evans_agt = navigator.userAgent.toLowerCase();
var evans_ie = ((evans_agt.indexOf("msie") != -1) && (evans_agt.indexOf("opera") == -1) && (evans_agt.indexOf("omniweb") == -1));
var evans_mymovey = new Number();
function evans_IeTrueBody(){
return (document.compatMode && document.compatMode!="BackCompat") ? document.documentElement : document.body;
}
function evans_GetScrollTop(){
return evans_ie ? evans_IeTrueBody().scrollTop : window.pageYOffset;
}
function evans_heartBeat(){
evans_diffY=evans_GetScrollTop();
evans_mymovey += Math.floor((evans_diffY-document.getElementById('evans_backi').style.top.replace("px","")+default_top_ps)*0.1);
document.getElementById('evans_backi').style.top = evans_mymovey+"px";
}
var evans_tmpintval = window.setInterval("evans_heartBeat()",1);
function evans_closeHeartBeat()
{
window.clearInterval(evans_tmpintval);
document.getElementById('evans_backi').style.display = 'none';
}
![](\"QQ/top.gif\")
![](\"QQ/bottom.gif\")
![](\"qq/12"+(online[0]?'':'_f')+".gif\" "\\"您好！请问有什么可以帮您吗？\\"")
![](\"QQ/1"+(online[0]?'':'_f')+".gif\" "\\"您好！我是皇冠在线客服！\\"")