代码如下:
<!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=utf-8" /><title>无标题文档</title><script type="text/javascript" language="javascript" src="../../jquery-1.7.1.min.js"></script><script language="javascript">$(document).ready(function(){$("#btn1").toggle(function(){$("p").fadeOut("slow");},function(){$("p").fadeIn("slow");});$("#btn2").toggle(function(){$("p").fadeTo("slow",0.66);},function(){$("p").fadeTo("slow",0.66);});});</script></head><body><p style="background:#3F3">this is pi<br>this is pi<br>this is pi<br>this is pi<br>this is pi<br>this is pi<br></p><input type="button" value="淡入/淡出" id="btn1"></body><input type="button" value="淡入/淡出 效果 透明度0.66" id="btn2"></html>