confirm() 方法用于显示一个带有指定消息和 OK 及取消按钮的对话框。系统自带提示
W3C地址::::::: http://www.w3school.com.cn/jsref/met_win_confirm.asp
http://www.w3school.com.cn/tiy/t.asp?f=hdom_confirm
<html> <head> <script type="text/javascript"> function show_confirm() { var r=confirm("Press a button!"); if (r==true) { alert("You pressed OK!"); } else { alert("You pressed Cancel!"); } } </script> </head> <body> <input type="button" onclick="show_confirm()" value="Show a confirm box" /> </body> </html>