<html> <head> <script type="text/javascript">// 页面监听js报错问题 οnerrοr=handleErrvar txt="" function handleErr(msg,url,l) { txt="本页中存在错误如下：\n\n" txt+="错误：" + msg + "\n" txt+="URL: " + url + "\n" txt+="行：" + l + "\n\n" alert(txt) console.log(txt) return true }function message() { addalert("Welcome guest!") lert("Welcome guest!") } message() </script> </head><body> <input type="button" value="查看消息" /> </body></html>
