Use CSS to control whether the OPTION in SELECT is not allowed to be selected_CSS/HTML

<style type="text/css"> .disabled { } .disabled optgroup{ font-size: 12px; font-style: normal; font-weight: normal; font-variant: normal; color:#CCCCCC; background-color: #F5F5F5; } .disabled option { padding-left:0px; } </style> <title></title> <select name="carCos" class="disabled"> <optgroup label="American"></optgroup> <option value="General Motors">General Motors</option> <option value="Ford">Ford Motor Company</option> <option value="Chrysler">DaimlerChrysler</option> <optgroup label="Japanese"> </optgroup> </select> It can be achieved in this abnormal way, and it looks good under firefox and ie6.
[Ctrl+A to select all Note: If you need to introduce external Js, you need to refresh it to execute ]