<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>定时器 延时调用setTimeout</title> <!-- setTimeout("代码a",n);打开页面n毫秒后执行代码a clearTimeout(setTimeout());取消setTimeout(); --> </head> <body> <script> var x;//全局变量x function a(){ x=setTimeout("document.write(‘我在5秒后显示‘)",1000);//将定时代码赋值给x } function b(){ clearTimeout(x);//清除x } a();//调用a b();//调用b </script> </body> </html>
原文：https://www.cnblogs.com/vinson-blog/p/12077403.html