The onmouseover event is a widely used event handler in HTML and JavaScript that triggers when a user hovers their mouse pointer over a specific element on a webpage. It’s commonly used to create ...

Though Twitter recently launched a newly redesigned site, users of the popular microblog are advised to use only third-party Twitter clients Tuesday morning to avoid a newly-exploited security hole.

Tuesday morning Twitter.com users were pummeled with a massive attack that subjected them to serial pop-ups, pornography and multi-colored tweets simply by scrolling the mouse over JavaScript code in ...

事件可以是浏览器行为，也可以是用户行为！ 网页中的每个元素都可以产生某些可以触发 JavaScript 函数的事件。比方说，我们可以在用户点击某按钮时产生一个 onClick 事件来触发某个函数。