.white A:active {
    TEXT-DECORATION: none
}
.white A:hover {
    TEXT-DECORATION: none
是不规范的伪类；
a.white:link {
    color: #FFFFFF;
}
a.white:hover {
    color: #00CCFF;
}
是规范的伪类。参考：


<style type="text/css"> <!-- A.style1:link    {     text-decoration: none;     color:#666666;     font-weight: normal; } A.style1:visited {     text-decoration: none;     color: #666666;     font-weight: normal; } A.style1:active {     text-decoration: none;     color: #333333;     font-weight: normal; } A.style1:hover {     text-decoration: underline overline;     color: #333333;     font-weight: normal; } A.style2:link    {     text-decoration: none;     color:#000099;     font-weight: normal; } A.style2:visited {     text-decoration: none;     color: #000099;     font-weight: normal; } A.style2:active {     text-decoration: none;     color: red;     font-weight: normal; } A.style2:hover {     text-decoration: none;     color: red;     font-weight: normal;     font-size: 120%; } --> </style> <p><a href="http://www.husw.net" class="style1">www.husw.net</a></p> <p><a href="http://www.husw.net" class="style2">www.husw.net</a></p>
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