function ShowMenuColumn(id)
{
	document.getElementById("menuleft"+id).style.display = ((document.getElementById("menuleft"+id).style.display=="block") ? "none" : "block");
	document.getElementById("arr"+id).src = ((document.getElementById("menuleft"+id).style.display=="block") ? "images/leftmenu_bullet_sub_down.gif" : "images/leftmenu_bullet_sub.gif");
}