var wrapper = document.getElementById("wrapper");
wrapper.style.position = "relative";
var str = "<div id=\"floatBtn\" style=\"top:330px;\"><a href=\"sign_up.aspx\" target=\"_blank\"><img src=\"../images/float_btn_01.gif\" /></a><a href=\"fee.aspx\" target=\"_blank\"><img src=\"../images/float_btn_02.gif\" /></a></div>"
wrapper.innerHTML += str;
var floatobj = document.getElementById("floatBtn");

var 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*/}
var percent=.1*(diffY-lastScrollY); 
if(percent>0)percent=Math.ceil(percent); 
else percent=Math.floor(percent); 
floatobj.style.top=parseInt(floatobj.style.top)+percent+"px";
lastScrollY=lastScrollY+percent; 
}
window.setInterval("heartBeat()",1);