如果大家在浏览一些网站时仔细留意一下,会发现有些网站会因应使用者不同的操作而改变网页元件的外观。例如当你移动滑鼠指标到某个连结图片上时,会使它变成不同的图样。 这种随著使用者不同的动作而产生不同效果的网页设计,使用JavaScript的事件处理程序可以很轻易地做出来。当滑鼠指标移到图片上时,浏览器会产 If you look carefully when browsing some websites, you may find that some websites may change the appearance of the webpage components according to different operations of the user. For example, when you move the mouse pointer to a linked image, it will make it a different pattern. This kind of web design that has different effects with different actions of users can be easily done using JavaScript event handlers. When the mouse pointer moved to the picture, the browser will produce