//取消订阅 a=2是取消订阅
//st:类型(1,2,3,4); ti:话题ID; 
function cancelSubscribe(oSelf, sType, sID){
	$ajax('/subscription/ajax_subs.php?a=2&sub_id='+ oSelf + '&st='+ sType + '&ti=' + sID, null,
		function(json){
			try{
				json = eval("(" + json + ")");
				if(json['state'] == 1){
					_alert(json['message']);
					if(typeof(oSelf) == 'string')
						oSelf = byId(oSelf);
					oSelf.parentNode.removeChild(oSelf);
					
					var sub_ul_readed = byId('sub_ul_readed');
					var sub_ul_unread = byId('sub_ul_unread');
					if(sub_ul_readed && sub_ul_readed.getElementsByTagName('li').length == 0){
						byId('sub_h4_readed').style.display = 'none';
					}
					if(sub_ul_unread && sub_ul_unread.getElementsByTagName('li').length == 0){
						byId('sub_h4_unread').style.display = 'none';
					}
				}
				else if(json['state'] == 0){
					_alert(json['message']);
				}
			}catch(e){	_alert('操作失败');}
		}
	);
}//
/** {{{ 将订阅设定为已读 setTagReaded(id,sType,sID)
 * @param  int 订阅的id
 */
function setTagReaded(id,obj){
	var sub_ul_readed = byId('sub_ul_readed');
	var li = byId(id);
	if(li.parentNode == sub_ul_readed){
		return ;
	}
	$ajax('/subscription/ajax_subs.php?a=readed&id='+ id, null,
		function(json){
			try{
				json = eval("(" + json + ")");
				if(json['state'] == 1){
					byId('count_reply_'+id).innerHTML = '0';
					obj.parentNode.removeChild(obj);

					
					var readedLis = byTagName(sub_ul_readed, 'li');
					if(readedLis.length){
						sub_ul_readed.insertBefore(li,readedLis[0]);
					}else{
						byId('sub_h4_readed').style.display = '';
						sub_ul_readed.appendChild(li);
					}
					var sub_ul_unread = byId('sub_ul_unread');
					if(sub_ul_unread.getElementsByTagName('li').length == 0){
						byId('sub_h4_unread').style.display = 'none';
					}
					
				}
				else if(json['state'] == 0){
					_alert('操作失败');
				}
			}catch(e){	_alert('操作失败');}
		}
	);
}//}}}