绑定windows对象 <!DOCTYPE html> <head> <meta charset="UTF-8"> <title>测试</titl…
绑定windows对象
<!DOCTYPE html> <head> <meta charset="UTF-8"> <title>测试</title> <script> window.onbeforeunload=function(e){ var e = window.event||e; e.returnValue=("确定离开当前页面吗？"); } </script> </head> <body> 测试 </body></html>绑定body对象
<!DOCTYPE html> <head> <meta charset="UTF-8"> <title>测试</title> <script> function checkLeave(){ event.returnValue="确定离开当前页面吗？"; } </script> </head> <body onbeforeunload="checkLeave()"> 测试 </body></html>久伴只是提取精华部分给大家使用，如果需要了解原理及浏览器支持请到原作者网站查看https://www.jb51.net/article/130010.htm
