$(document).ready(function() {
   $("#tab1").click(function() {
      reset();
      $("#tab-content-1").attr('class','tab-content-selected');
      $("#tab1").attr('class','tab-navigation-selected');
      return false;
   });
   $("#tab2").click(function() {
      reset();
      $("#tab-content-2").attr('class','tab-content-selected');
      $("#tab2").attr('class','tab-navigation-selected');
      return false;
   });
   $("#tab3").click(function() {
      reset();
      $("#tab-content-3").attr('class','tab-content-selected');
      $("#tab3").attr('class','tab-navigation-selected');
      return false;
   });
});

function reset() {
   $("#tab-content-1").attr('class','tab-content-hidden');
   $("#tab-content-2").attr('class','tab-content-hidden');
   $("#tab-content-3").attr('class','tab-content-hidden');
   $("#tab1").attr('class','tab-navigation-normal');
   $("#tab2").attr('class','tab-navigation-normal');
   $("#tab3").attr('class','tab-navigation-normal');
}