演示:

代码在线操作代码:

 <p class="MsoNormal"><textarea style="width:679px;height:94px;" cols="50" rows="15" name="code" class="c-sharp">
<style>
    .button { border:1px solid #b1b4cd; background:#696d81; color:#ffffff; height:25px; line-height:25px; }
</style>
<script language="javascript">
function runCode(obj){
    var bb=window.open('', "_blank", '');
    bb.document.open('text/html', 'replace');
    bb.opener = null; // 防止代码对页面修改
    var obj=document.getElementById(obj);
    bb.document.write(obj.value);
    bb.document.close();
}
function copycode(obj) {
    var obj=document.getElementById(obj);
    obj.select();
    document.execCommand("copy");
}
function saveCode(obj) {
    var obj=document.getElementById(obj);
    document.write(obj.value);
    document.close();
    document.execCommand("saveAs",0,"nuodou_com_test.htm");
}
</script>
<textarea id="code" cols=80 rows=15>加上你的代码</textarea>
<br /><br />
<input type="button" onclick='javascript:runCode("code")' value="运行代码" class="button">
<input type="button" onclick='javascript:copycode("code")' value="复制代码" class="button">
<input type="button" onclick='javascript:saveCode("code")' value="另存代码" class="button">
<br /><br />
</textarea>&nbsp;</p>