$(document).ready(function(){
	// slide blocks ************************************************************
	var _block = $('#main-nav > li');
        if (_block) {
	  var _closeTime = 5000;
	
	  _block.each(function(i, block){
		  var _link = $('a.opener', block);
		  var _slide = $('ul', block);
		  var _timer = false;
		  
		  if ($(block).hasClass('active')) {
			  _slide.slideDown(300);
		  }
		  _link.mouseover(function(){
			  $(block).toggleClass('active');
			  _slide.slideToggle(300);
		  });
		  $(block).mouseenter(function(){
			  if (_timer) clearTimeout(_timer);
		  });
		  $(block).mouseleave(function(){
			  if (_slide.is(':visible')) {
				  _timer = setTimeout(function(){
					  _slide.slideUp(300, function(){
						  $(block).removeClass('active');
					  });
				  }, _closeTime);
			  }
		  });
	  });	
        }
});