在Opera浏览器删除超级链接的下划线

<div style=\'background-color:#ffffe1;font-family:Courier;font-size:9pt;color:green;padding:8px;border:1px dotted green;margin:5px;overflow:auto;\'>@charset \"utf-8\";
/*Name: 用户样式 (全局) */
body * {
font-family: Tahoma,Candara,Corbel,Calibri;
}
a {
text-decoration: none !important;
}
a:hover {
text-decoration: underline !important;
}</div>