function toggleMenu( obj ) {
	//get all main items
	var li = $(obj).up(1).childElements();
	var c = $(obj).className;
	
	//hide all main item children
	for(var i = 0, n = li.length; i < n; i++) { 
		var children = li[i].childElements(); 
		
		if( children[0].className == 'btnClose' ) {
			children[0].className = 'btnOpen';
		}
		
		if( children[2] ) { 
			children[2].hide(); 
		} 
	} 
	
	if( c == 'btnClose' ) {
		$(obj).className = 'btnOpen';
	}
	else {
		$(obj).next().next().show();
		$(obj).className = 'btnClose';
	}
	
	return false;
}