The JavaScript Navigator object contains information about the visitor's browser. JS的导航对象包含了有关访问者浏览器的信息 Browser Detection 浏览器的判别 Almost everything in this tutorial works on all JavaScript-enabled browsers. However, there are some things that just don

JavaScript can be used to validate input data in HTML forms before sending off the content to a server. JS可以用来校验HTML表单提交给服务器的数据（是否符合规范） JavaScript Form Validation JS表单校验 JavaScript can be used to validate input data in HTML forms before sending off t

With JavaScript we can create animated images. 使用JS我们可以建立动态的图片 JavaScript Animation JavaScript 动画 It is possible to use JavaScript to create animated images. 使用JS来建立动态的图片是可行的 The trick is to let a JavaScript change between different images on differe

An image-map is an image with clickable regions. 图象映象是图片的可点区域（一图片多个链接区） HTML Image Maps HTML 图象映象 From our HTML tutorial we have learned that an image-map is an image with clickable regions. Normally, each region has an associated hyperlink. Clicking

With JavaScript, it is possible to execute some code NOT immediately after a function is called, but after a specified time interval. This is called timing events. 使用JS是可以让函数不直接执行的，而是在过了一个指定的时间间隔后才执行。这就叫做时间事件。 JavaScript Timing Events JS时间事件 With Jav