function menu_1()
{
	$("#menu-1").animate({"height": "toggle"}, { duration: 500 });
}

function menu_2()
{
	$("#menu-2").animate({"height": "toggle"}, { duration: 500 });
}

function menu_3()
{
	$("#menu-3").animate({"height": "toggle"}, { duration: 500 });
}

function menu_4()
{
	$("#menu-4").animate({"height": "toggle"}, { duration: 500 });
}