$(document).on('mousedown', '.btn', function(event){
			event.preventDefault();
			var id = parseInt($(this).attr('id').replace('btn_', ''));
			click_wait = false;
			mousetimer = setTimeout(function(){
				click_wait = true;
				setTimer(id);	
			}, 2000);
		});
		$(document).on('mouseup', '.btn', function(){
			clearTimeout(mousetimer);
			if (!click_wait){
				var id = parseInt($(this).attr('id').replace('btn_', ''));
				switchController(id);
				console.log('click !!!');
				click_wait = false;
			}
		});
	function switchController(id){
		var el = $('.btn#btn_' + id);
		var state = parseInt($(el).attr('state'));
		var need_state;
		if (state == 0){
			need_state = 1;
		} else if (state == 1){
			need_state = 0;
		}
		$(el).addClass('waiting');
		$.ajax({
			url: 'engine/ajax.php',
			type: 'POST',
			dataType: 'json',
			data: {action: 'setState', id: id, state: state, need_state: need_state},
		})
		.done(function(data) {
			if (data.success == 'ok'){
				$(el).attr('state', need_state);
				$(el).removeClass('waiting').removeClass('btn_on').removeClass('btn_off');
				if(need_state == 1){
					$(el).addClass('btn_on');
				} else if(need_state == 0){
					$(el).addClass('btn_off');
				}
			}
		})
		.fail(function(data) {
			console.log('error');
		});
	}
	function setTimer(id){
		var el = $('.btn#btn_' + id);
		var state = parseInt($(el).attr('state'));
		var need_state;
		if (state == 0){
			need_state = 1;
		} else if (state == 1){
			need_state = 0;
		}
		$(el).attr('seconds', 0);
		$(el).addClass('seconds');
		$.ajax({
			url: 'engine/ajax.php',
			type: 'POST',
			dataType: 'json',
			data: {action: 'setTimer', id: id, state: state, need_state: need_state},
		})
		.done(function(data) {
		})
		.fail(function(data) {
			console.log('error');
		});
	}