if(navigator.userAgent.toLowerCase().indexOf("msie 7")!=-1){
	document.all.alibaba_member_img.innerHTML = "<img src=\"/js/alibaba_member.png\" width=\"113\" height=\"157\" border=\"0\" />";
}else{
	document.all.alibaba_member_img.innerHTML = "<img src=\"/js/alibaba_member.jpg\" width=\"106\" height=\"149\" border=\"0\" />";
}

var lastScrollY=0;
var diffY=0,percent=0,oH_Now=0;
function heartBeat(){
	diffY=document.body.scrollTop?document.body.scrollTop:document.documentElement.scrollTop;
	oH_Now=document.all.AlibabaMember.style.pixelTop
	if(diffY-lastScrollY>0 || oH_Now!=100){
		percent=.1*(diffY-lastScrollY);
		if(percent>100)percent=Math.ceil(percent);
		else percent=Math.floor(percent);
		
		if(oH_Now<100)
			document.all.AlibabaMember.style.pixelTop=100;
		else
			document.all.AlibabaMember.style.pixelTop+=percent;
		
		lastScrollY=lastScrollY+percent;
	}
}
window.setInterval("heartBeat()",5);