onmouseover="javascript:displaylist1();this.className='biana';wl.className='noimg2';dn.className='bj4'" 上面这句话触发四个事件，javascript:displaylist1()是javascript函数，this.className='biana'是一个CSS类样式，wl.className= ...

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 ...