lastScrollY = 0;
function heartBeat(){
var diffY;
if (document.documentElement && document.documentElement.scrollTop)
diffY = document.documentElement.scrollTop;
else if (document.body)
diffY = document.body.scrollTop
else
{/*Netscape stuff*/}
//alert(diffY);
percent=.1*(diffY-lastScrollY);
if(percent>0)percent=Math.ceil(percent);
else percent=Math.floor(percent);
document.getElementById("leftDiv").style.top = parseInt(document.getElementById("leftDiv").style.top)+percent+"px";
document.getElementById("rightDiv").style.top = parseInt(document.getElementById("rightDiv").style.top)+percent+"px";
lastScrollY=lastScrollY+percent;
//alert(lastScrollY);
}
//下面这段删除后，对联将不跟随屏幕而移动。
window.setInterval("heartBeat()",1);
//-->
//关闭按钮
function close_left1(){
    left1.style.visibility='hidden';
}
function close_left2(){
    left2.style.visibility='hidden';
}
function close_right1(){
    right1.style.visibility='hidden';
}
function close_right2(){
    right2.style.visibility='hidden';
}

//显示样式
document.writeln("<style type=\"text\/css\">");
document.writeln("#leftDiv,#rightDiv{width:100px;height:100px;position:absolute;}");
document.writeln(".itemFloat{width:100px;height:auto;line-height:5px}");
document.writeln("<\/style>");

//以下为主要内容
document.writeln("<div id=\"leftDiv\" style=\"top:100px;left:5px\">");

//------左侧各块开始
//---L1
document.writeln("<div id=\"left1\" class=\"itemFloat\">");
document.writeln("<a href=http://www.scichi.com/ad0805/zzjy_1.html target=_blank ><img src= http://www.scichi.com/img/zzjy.jpg border=0>");
document.writeln("<br><a href=\"javascript:close_left1();\" title=\"关闭上面的广告\">×<\/a><br><br><br><br>");
document.writeln("<\/div>");
//---L2
document.writeln("<div id=\"left2\" class=\"itemFloat\">");
document.writeln("<a href=http://www.scichi.com/new/read/ads.asp target=_blank ><img src= http://www.scichi.com/ad0805/3.jpg border=0></a>");
document.writeln("<br><a href=\"javascript:close_left2();\" title=\"关闭上面的广告\">×<\/a>");
document.writeln("<\/div>");

//------左侧各块结束
document.writeln("<\/div>");
document.writeln("<div id=\"rightDiv\" style=\"top:100px;right:5px\">");

//------右侧各块结束
//---R1
document.writeln("<div id=\"right1\" class=\"itemFloat\">");
document.writeln("<a href=http://www.scichi.com/ad0805/jjky_1.html target=_blank ><img src= http://www.scichi.com/ad0805/zoule.jpg border=0></a>");
document.writeln("<br><a href=\"javascript:close_right1();\" title=\"关闭上面的广告\">×<\/a><br><br><br><br>");
document.writeln("<\/div>");
//---R2
document.writeln("<div id=\"right2\" class=\"itemFloat\">");
document.writeln("<a href=http://www.scichi.com/new/read/ads.asp target=_blank ><img src= http://www.scichi.com/ad0805/3.jpg border=0></a>");
document.writeln("<br><a href=\"javascript:close_right2();\" title=\"关闭上面的广告\">×<\/a>");
document.writeln("<\/div>");

//------右侧各块结束
document.writeln("<\/div>");