jquery-seat-charts插件是什么

$(document).ready(function() {
    var $cart = $('#select-seat'),
        $counter = $('#counter'),//显示框
        sc = $('#seat-map').seatCharts({//座位框
            map: [//_是过道，e是座位
              'eea_eee','eee_eee','eee_eee'
            ],
            seats: {
               a: {
                    classes : 'busy-class',
                    category: '已预定'
                },
                e: {
                    classes : 'free-class',
                    category: '空闲'
                },
            },
            naming : {
                top : false,//不显示列的编号
                left:true,   //显示左边（行）的编号
           	    row:['1','2','3''],//可以自定义行和列    
                columns: ['1','2','3','A','4','5','6'], //过道也要给个编号！！！
                getLabel : function (character, row, column) {
                    return SeatLabel ++;
                }//label中显示序号
            },

        legend : {//标识列表
            node : $('#legend'),
            items : [
                [ 'e', 'available',   '空闲座位'],
                [ 'a', 'unavailable', '已预定'],
                [ 'f', 'unavailable',   '维修中' ]
            ]
        },
        click: function () {
            if (this.status() == 'available') {
                if (ChooseFloor>0) {//只选一个座位的办法
                    $('#cart-item-'+oldId).remove();
                    ChooseFloor--;//已选择的个数
                    sc.find('selected').status('available');
                }
                $('
'+'选择'+this.data().category+this.settings.label+'号座位'+' [删除]
')
                    .attr('id','cart-item-'+this.settings.id)
                    .data('seatId', this.settings.id)
                    .appendTo($cart);
                ChooseFloor++;
               //座位号 ：this.settings.label
                oldId=this.settings.id;//上一个选择的座位
                oldStatus=this.status();//更改状态
                return 'selected';
            } else if (this.status() == 'selected') {
                $('#cart-item-'+this.settings.id).remove();
                return 'available';
            } else if (this.status() == 'unavailable') {
                return 'unavailable';
            } else {
                return this.style();
            }
        }
    });
$('#select-seat').on('click', '.cancel', function () {
    sc.get($(this).parents('li:first').data('seatId')).click();
});