function switchSub(object){
	if(object.getElementsByTagName('ul').length > 0){
		fUl = object.getElementsByTagName('ul')[0];
		if(fUl.style['visibility'] != 'visible'){
			fUl.style['visibility'] = 'visible'
		}else{
			fUl.style['visibility'] = 'hidden'
		}
	}
}