常上网冲浪的朋友经常会看到用JavaScript脚本实现的各种网页切换效果,虽然为网页添色不少,但也有弊端。首先必须打开浏览器对JavaScript的支持功能,其次还得在网页中添上冗长的代码,而多数人为了速度和安全不愿意打开对JavaScript的支持功能。本 Often surfing friends will often see the use of JavaScript script to achieve a variety of web page switching effect, although a lot of pages to add color, but there are drawbacks. First, you have to turn on your browser’s support for JavaScript, and second, you have to add lengthy code to your web pages, and most people do not want to turn on JavaScript support for speed and security. this