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= ...

Google is constantly combatting search engine spammers (I know some to do not like to be called this, so sorry). This past update, they began blocking an other type of spam named onmouseover ...