$( function() {

  $("#header-logos a").hover( function() {

      var targetImg = $(this).attr("rel");      
      $("#school-names img").each( function(i) {
        if ( targetImg.length > 0 && targetImg == $(this).attr("src") ) {
          $("#school-names img").css("visibility", "hidden");
          $(this).css("visibility", "visible");
        }
      }); 

    },  function() {
      $("#school-names img").css("visibility", "hidden");
      $("#school-names #default-schoolname").css("visibility", "visible");
    });

});