mapInfo = {
    "mapName": "wcs",
    "rackCount": 13,
    "crnCount": 4,
    "stbCount": 4,
    "hpPosition": 0,
    "minBayNo": 1,
    "floors": 1,
    "racks": [
        {
        "type": "rack",
        "id": "rack7",
        "top": 326,
        "left": 500,
        "width": 1000,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 42,
        "hiddenArr": [1,2,3,4,5,6,7,8,9,10,11,15,16]
    },
        {
        "type": "rack",
        "id": "rack6",
        "top": 303,
        "left": 500,
        "width": 1000,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 42,
        "hiddenArr": [1,59]
    },
        {
        "type": "rack",
        "id": "rack5",
        "top": 209,
        "left": 500,
        "width": 1000,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 42,
        "hiddenArr": [1,5,6,15,16,25,26,35,36]
    },
        {
        "type": "rack",
        "id": "rack4",
        "top": 232,
        "left": 500,
        "width": 1000,
        "height": 23,
        "minBayNo": 1,
        "maxBayNo": 42,
        "hiddenArr": [1]
    }],
    "crns": [ {
        "type": "crane",
        "id": "crn-1",
        "text": "1",
        "top": 265,
        "left": 444,
        "width": 93,
        "height": 22
    },{
        "type": "track",
        "id": "lb_track1",
        "text": "",
        "top": 274,
        "left": 500,
        "width": 1000,
        "height": 2
    }],
    "areas": [{
        "type": "Control_floor",
        "id": "tabControl_floor1",
        "text": "楼层",
        "top": 66,
        "left": 580,
        "width": 334,
        "height": 714,
        "floors": [{
            "type": "floor",
            "id": "page_floor1",
            "text": "1F",
            "top": 4,
            "left": 422,
            "width": 308,
            "height": 706,
            "stns": [{
                "type": "stn",
                "id": "site-100",
                "text": "100",
                "top": 232,
                "left": 460,
                "width": 62,
                "height": 23
            }]
        }]
    }]
}