$(document).ready(function() {
	// calculate height of container
	$("#content-container").height($("#content").height() + $("#signpost-container").height() + 340);
});

function showSubMenu(id)
{
	// hide all submenus
	$(".submenu").hide();
	// get the position of the placeholder element
	var pos = $("#menu" + id).offset();  
	$("#submenu" + id).css( { "left": (pos.left + 2) + "px" } );
	$("#submenu" + id).show();
}