onerror 事件

  1. <!DOCTYPE html>
  2. <html>
  3. <head>
  4. <script>
  5. onerror = handleErr;
  6. var txt = "";
  7. function handleErr(msg, url, l) {
  8.   txt = "此页面出错。\n\n";
  9.   txt += "错误：" + msg + "\n";
  10.   txt += "URL：" + url + "\n";
  11.   txt += "Line：" + l + "\n\n";
  12.   txt += "单击“确定”以继续。\n\n";
  13.   alert(txt);
  14.   return true;
  15. }
  16.  
  17. function message() {
  18.    adddlert("欢迎访客！");
  19. }
  20. </script>
  21. </head>
  22.  
  23. <body>
  24. <input type="button" value="查看消息" onclick="message()" />
  25. </body>
  26.  
  27. </html>