// Navigation Menu jquery
var navTimer = null;

$(document).ready(function() {
  $("ul.menu").hover(function(){
	if ( navTimer ) {
	  clearTimeout( navTimer );
	  navTimer = null;
	} else {
	  $("#map_canvas").toggleClass('hidden');
	  $("ul.submenu").slideDown("fast");
	}
  }, function(){
	navTimer = setTimeout(function(){
	  $("ul.submenu").slideUp("fast");
	  $("#map_canvas").toggleClass('hidden');
	  navTimer = null;
	}, 100);
  });
});