Code that can test the running effect of javascript_javascript skills

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>You can write simple JavaScript in the code box</title> <!--用户界面，一文本框，一按钮 --> <div align="center" style="boeder-right:#000000 1px solid; boeder-top:#000 1px solid; border-left:#000 1px solid; width:618px;border-right:#000 1px solid;height:336px;background-color:#FF0"> <textarea id="txtre" style="width:612px;height;300px"> <input id="btnTest" type="button" value="执行程序" onclick="return btn_onclick()" style="width:145ppx">

[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh to execute

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The above is from an experiment I found what I found in the example and posted it to share with everyone. I also saved it for myself, haha...