$(document).ready(function(){
  var videoBtns = $("#voo li a");
  var photoBtns = $("#phoo li a");
 
  videoBtns.click(function(e){
    e.preventDefault();
    videoBtns.each(function() {
      var vidName = "#" + $(this).attr('rel');
      $(vidName).addClass('hideme');
    });
    var nowplayID = "#" + $(this).attr('rel');
    $(nowplayID).removeClass('hideme');
  });
  
  photoBtns.click(function(e){
    e.preventDefault();
    var source = $(this).attr('rel');
    $("#pic").attr('src',source);
  });
});