button, span.tab-inactive, .tab-whitespace span.command
  { behavior: url('http://lindaocta.com/wp-content/uploads/2008/06/iefixes.htc');
  }
        .tab {
       display: block;
       cursor: auto;
       padding: 2px;
       width: 6em;
       font-size: 2em;
     }
    
     .tab-spacer{
       display: block;
       cursor: auto;
       padding-bottom: 3px;
     }
    
     span.tab-inactive {
       padding-top: 4px;
       padding-bottom: 4px;
       background-color: #d9d9d9;
       color: #0d2474;
       background: none;
       background-color: none;
       text-align: center;
       font-size: 2em;
       cursor: pointer;
     }
   
     span.tab-inactive:hover, span.tab-inactive.hover {
       font-weight: normal;
       padding-top: 4px;
       padding-bottom: 4px;
       color: #0d2474;
       background: none;
       background-color: #c0d0ff;
       text-align: center;
       font-size: 2em;
       cursor: pointer;
     } 
    
     .tab-whitespace span.command:hover, .tab-whitespace span.command.hover {
    text-decoration: underline;
    background-color: transparent;
    cursor: pointer;
     }