function ctgToggleMenu(iInstanceId)
{
	var oMenu = document.getElementById('dropdown_' + iInstanceId.toString());
	if ( oMenu ) {
		var oItems = oMenu.getElementsByTagName('li');
		var sDisplay = ( oItems[1].style.display == 'block' ) ? 'none' : 'block';
		for (var i = 1; i < oItems.length; i++) {
			oItems[i].style.display = sDisplay;
		}
	}
	return;
}