复制代码 代码如下:

<a id="readylink" href="javascript:download();">请等待</a>

<a id="downloadlink" href="http://www.jb51.net/">下载</a>

<script type="text/javascript">

var timeout="25";

function countdown()

{

if (timeout<=0)

{

document.getElementById("readylink").style.display="none";

document.getElementById("downloadlink").style.display="block";

}

if (timeout>0)

{

document.getElementById("readylink").innerHTML='请稍等'+timeout+'秒';

setTimeout("countdown()",1000);

}

timeout--;

}

countdown();

function download() {

if(timeout>0) {

alert('请稍等，服务器正在取得相关资源。');

}

}

</script>