<textarea style="width: 450; height: 300" id="theCode" title="双击运行代码" ondblclick="runCode(‘theCode‘);">这里放入运行的Html代码。</textarea><br /><input onclick="runCode(‘theCode‘)" value="http://www.mamicode.com/运行代码" type="button"> <input onclick="doCopy(‘theCode‘)" value="http://www.mamicode.com/复制代码" type="button"> <input onclick="doSave(‘theCode‘,‘test‘)" value="http://www.mamicode.com/保存代码" type="button">

<script type="text/javascript">    //执行代码    function runCode(obj) {        var winname = window.open(‘‘, "_blank", ‘‘);        var content = document.getElementById(obj).value;        winname.document.open(‘text/html‘, ‘replace‘);        winname.opener = null        winname.document.writeln(content);        winname.document.close();    }     //复制代码    function doCopy(obj){        var codeObj = document.getElementById(obj);        clipboardData.setData(‘text‘, codeObj.innerText);        alert(‘已经复制代码‘);    }     // 另存为文件    function doSave(obj, filename){           var win = window.open(‘‘, ‘_blank‘, ‘top=10000‘);        var code = document.getElementById(obj).innerText;        win.opener = null;        win.document.write(code);        win.document.execCommand(‘saveas‘, true, filename);        win.close();    }</script>