<div class="htmlarea"> <textarea id="runcode32616"> <div id="time"></div> <script type="text/javascript"> var a = 0; function tran(){ var time = document.getElementById('time'); time.innerHTML = a++; window.setTimeout('tran()',1000); } window.setTimeout('tran()',1000); </script> </textarea><br><input onclick="runEx('runcode32616')" type="button" value="运行代码"> <input onclick="doCopy('runcode32616')" type="button" value="复制代码"> <input onclick="doSave(runcode32616)" type="button" value="保存代码">[Ctrl+A 全选 注:<a href="http://www.jb51.net/article/23421.htm" title="查看具体详情" target="_blank">如需引入外部Js需刷新才能执行</a>]</div>