a.nav1 img { vertical-align: top; }
a.nav2 img { vertical-align: top; }
a.nav3 img { vertical-align: top; }
a.nav4 img { vertical-align: top; }

td>a.nav1 { border: 1px solid transparent; }
td>a.nav2 { border: 1px solid transparent; }
td>a.nav3 { border: 1px solid transparent; }
td>a.nav4 { border: 1px solid transparent; }

a.nav1 img { height: 23px; }
a.nav2 img { height: 23px; }
a.nav3 img { height: 23px; }
a.nav4 img { height: 23px; }

a.nav1:link { background-image: url("../images/2ndlevel_call1.gif"); background-repeat: no-repeat; }
a.nav1:visited { background-image: url("../images/2ndlevel_call1.gif"); background-repeat: no-repeat; }
a.nav1:hover { background-image: url("../images/2ndlevel_call2.gif"); background-repeat: no-repeat; }
a.nav1:active { background-image: url("../images/2ndlevel_call1.gif"); background-repeat: no-repeat; }

a.nav2:link { background-image: url("../images/2ndlevel_program1.gif"); background-repeat: no-repeat; }
a.nav2:visited { background-image: url("../images/2ndlevel_program1.gif"); background-repeat: no-repeat; }
a.nav2:hover { background-image: url("../images/2ndlevel_program2.gif"); background-repeat: no-repeat; }
a.nav2:active { background-image: url("../images/2ndlevel_program1.gif"); background-repeat: no-repeat; }

a.nav3:link { background-image: url("../images/2ndlevel_information1.gif"); background-repeat: no-repeat; }
a.nav3:visited { background-image: url("../images/2ndlevel_information1.gif"); background-repeat: no-repeat; }
a.nav3:hover { background-image: url("../images/2ndlevel_information2.gif"); background-repeat: no-repeat; }
a.nav3:active { background-image: url("../images/2ndlevel_information1.gif"); background-repeat: no-repeat; }

a.nav4:link { background-image: url("../images/2ndlevel_supporters1.gif"); background-repeat: no-repeat; }
a.nav4:visited { background-image: url("../images/2ndlevel_supporters1.gif"); background-repeat: no-repeat; }
a.nav4:hover { background-image: url("../images/2ndlevel_supporters2.gif"); background-repeat: no-repeat; }
a.nav4:active { background-image: url("../images/2ndlevel_supporters1.gif"); background-repeat: no-repeat; }