function menuAction(menu,submenu) {
	var down =false;
	var ot;
	menu.hover(function(){if (ot!="undefined")clearTimeout(ot);if(!down)submenu.slideDown(50);down=true;},function(){ot = setTimeout(function(){submenu.slideUp(10);down=false},10);});
}

$(function(){
 	this.init = function(){
		menuAction($("#product"),$("#product_submenu"));
		menuAction($("#case"),$("#case_submenu"));
		menuAction($("#about"),$("#about_submenu"));
		menuAction($("#job"),$("#job_submenu")); 		
		
		
		menuAction($("#p1"),$("#p1_sub"));
		menuAction($("#p2"),$("#p2_sub"));
		menuAction($("#c1"),$("#c1_sub"));
		menuAction($("#c2"),$("#c2_sub"));
 	} 
	
	this.init();  
});