function page(id)
{
  $.ajax({
    url: "marc." + id + ".html",
    success: function(contingut) {
      $('#content').html(contingut);
    }
  });
//  document.getElementById("marc").setAttribute("src", "marc." + id + ".html");
}

$(document).ready(function () {

  function getimgname(e, g)
  {
    var l = 'img/menu/';
    l = l.length;
    var u = $(e).attr("src");
    var a = u.substr(l, 1) == 'g';
    return (g?'g':'') + u.substr((a?l+1:l), u.length);
  }

  var images = [];
  $('#menu img').each(function(i, e){
    images[i] = $(this).attr("src").substr(5, 100);
  });
  
  $('#menu img').mouseover(function() {
    $(this).attr("src", "img/menu/" + getimgname(this, 0));
  });

  $('#menu img').mouseout(function() {
    $(this).attr("src", "img/menu/" + getimgname(this, 1));
  });
});