<div class="htmlarea"> <textarea id="runcode23043"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>判断对象是否是某一类型</title> <script language="javascript" type="text/javascript"> var obj = new String("脚本之家"); alert(obj instanceof String); </script> </textarea><br><input onclick="runEx('runcode23043')" type="button" value="运行代码"> <input onclick="doCopy('runcode23043')" type="button" value="复制代码"> <input onclick="doSave(runcode23043)" 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>
