function nav()
{
	var w = document.genre_form.genre.selectedIndex;
	var url_add = "events.php?genre="+document.genre_form.genre.options[w].value;
	window.location.href = url_add;
}

function nav2()
{
	var w = document.presenter_form.presenter.selectedIndex;
	var url_add = "events.php?presenter="+document.presenter_form.presenter.options[w].value;
	window.location.href = url_add;
}