a {
      display:block;
      color:white;
      background-color:#6caceb;

    <!--
      width:118px;
    -->

      padding:0px;
      font-size:17px;
      font-family:arial;
      font-weight:normal;
      text-decoration:none;
      text-align:center;
      margin:0px;
      border:1px solid #6caceb;
      background-image:url(blau1.jpg);
      }
   a:hover {
      display:block;
      color:black;
      background-color:#6caceb;
      background-image:url(weiss.jpg);
      }