文字来回上下移动或跳动的代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>文字来回上下移动或跳动</title> 
</head> 
<body> 
<script language="JavaScript"> 
<!-- 
done = 0; 
step = 4 
function anim(yp,yk) 
{ 
if(document.layers) document.layers["napis"].top=yp; 
else document.all["napis"].style.top=yp; 
if(yp>yk) step = -4 
if(yp<60) step = 4

setTimeout('anim('+(yp+step)+','+yk+')', 10); 
}

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

文字来回上下移动或跳动的代码_文字特效