var timer, subTimer;

function showMenu(id, value){
	clearTimeout(timer);
	var colEl = id.split(':');
	for ( var i = 0; i < colEl.length; i++ ){
		var el = document.getElementById(colEl[i]);
		el.style.visibility = value;
	}
}

function hideMenu(id){
	timer =  setTimeout("showMenu('"+id+"','hidden')", 300);
}

function hideSubMenu(id){
		var el = document.getElementById(id);
		el.style.visibility = 'hidden'
}