点此处秒后立即下载

<form name="agree"><td align="center" valign="middle" bgcolor="#FFFFFF"> <b>正 在 连 接 下 载 中 <SPAN ID=BT></SPAN></b> <input name="agreeb" type="button" class="buttonface" onClick="javascript:top.location='../down2.asp?id=7596&no=1'" value="点此处(15 秒后)立即下载"> <SCRIPT language=javascript> <!-- var secs = 15; document.agree.agreeb.disabled=true; for(i=1;i<=secs;i++) { window.setTimeout("update(" + i + ")", i * 1000); } function update(num) { if(num == secs) { document.agree.agreeb.value =" 点 此 处 立 即 下 载 "; document.agree.agreeb.disabled=false; BTDownLink.innerHTML=" "; } else { printnr = secs-num; document.agree.agreeb.value = "点此处(" + printnr +" 秒后立即下载)"; BT.innerHTML=BT.innerHTML+"."; } } //--> </SCRIPT><SPAN ID=BTDownLink></SPAN>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]