1. Javascript 返回上一页 history.go(-1), 返回两个页面: history.go(-2);

  2. history.back().

  3. window.history.forward()返回下一页

  4. window.history.go(返回第几页,也可以使用访问过的URL) 

例:
<a href="javascript:history.go(-1);">向上一页</a>

response.Write("<script language=javascript>")
response.Write("if(!confirm('完成任务?')){history.back();}")
response.Write("</script>")
response.Write("<script language=javascript>history.go(-1);</script>")
<a href="javascript:history.go(-1);">向上一页</a>

页面跳转:onclick="window.location.href='list.aspx'"

P.S.
小技巧(JS引用JS):
<script type=text/javascript>
<!--
if (typeof SWFObject == "undefined") {
document.write('<scr' + 'ipt type="text/javascript" src="/scripts/swfobject-1.5.js"></scr' + 'ipt>');}
//-->
</script>