function clearField(e, d) {
  if (e.value == d) {
    $(e).val("").css("color", "#000000");
  }
}

function resetField(e, d) {
  if (e.value == "") {
    $(e).val(d).css("color", "#999999");
  }
}

var openTab = -1;

function showNavTab(btn, i) {
  if (openTab != i) {
    openTab = i;
    hideNavTabs();
    var b = $(btn);
    var o = b.offset();
    var e = $("#navTab" + i);
    e.stop()
      .css("visibility", "hidden")
      .css("display", "block")
      .fadeTo(0, 0)
      .css("top", o.top + b.height() + 9)
      .css("left", o.left + (b.width() / 2) - (e.width() / 2))
      .css("visibility", "visible")
      .fadeTo(250, 1)
      .bind("mouseenter", function() {
         openTab = i;
      })
      .bind("mouseleave", function() {
        openTab = -1;
        window.setTimeout("hideNavTabs();", 500);
      });
    b.bind("mouseleave", function() {
      openTab = -1;
      window.setTimeout("hideNavTabs();", 500);
    });
  }
}

function hideNavTabs() {
  var tabs = $(".navTab:not(#navTab" + openTab + ")");
  tabs.stop()
    .fadeTo(250, 0, function() {
      tabs.css("display", "none");
    });
}