js遍历json根据id选择属性值显示对应的div？

有3个json，它们之间可以找到相同的id，我想要的是选择了属性1下面的属性值，然后再选择属性2下面的属性值（属性1是必有的，但是属性2可能有的情况下没有），请问我该怎么写js可以实现？
//属性1
var arr1 = {
"attributes": {
"1": {
"id": "1",
"options": [{
"id": "2",
"products": ["4", "5"]
}, {
"id": "3",
"label": "0.05Ohm",
"price": "3",
"oldPrice": "3",
"products": ["6"]
}]
},
"7": {
"id": "7",
"options": [{
"id": "8",
"products": ["4"]
}, {
"id": "9",
"products": ["10"]
}]
}
},
"template": "price",
}
//属性2
var arr2 = {
"7":{
"8":[
"4"
],
"9":[
"10"
]
},
"1":{
"2":[
"4",
"5"
],
"3":[
"6"
]
}
}
//仓库
var arr3={
"4":{
"qty":"5",
"html":"Warehouse1”
},
"5":{
"qty":"6",
"html":"Warehouse2"
},
"6":{
"qty":"22",
"html":"Warehouse3"
},
"10":{
"qty":"13",
"html":"Warehouse4"
}
}

我觉得你的需求应该是根据arr2的输入去得到对应的arr3里的库存信息吧，其中arr1是作为商品表作为过渡
废话不说，代码如下

Array.intersect = function(arr1, arr2) {
  if(Object.prototype.toString.call(arr1) === "[object Array]" && Object.prototype.toString.call(arr2) === "[object Array]") {
    return arr1.filter(function(v){ 
     return arr2.indexOf(v)!==-1 
    }) 
  }
}

var i = 0;
for(var k1 in arr2) {
    for(var k2 in arr2[k1]) {
        var options = arr1.attributes[k1].options;
        var found = false;
        for(i = 0; i < options.length; i++) {
            if(options[i].id == k2) {
                found = true;
                break;
            }
        }
        if(!found) continue;

        var products = options[i].products;
        // 求商品表和购买表的交集
        products = Array.intersect(products, arr2[k1][k2]);
        for(i = 0; i < products.length; i++){
            console.log(k1 + ":" + k2 + ":" + products[i] + "=");
            console.log(arr3[products[i]]);
        }
    }
}

建议使用markdown语法格式化一下JS代码，提高适读性，如：

var arr1 = {
    "attributes": {
        "1": {
            "id": "1",
            "options": [{
                    "id": "2",
                    "products": ["4", "5"]
                }, {
                    "id": "3",
                    "label": "0.05Ohm",
                    "price": "3",
                    "oldPrice": "3",
                    "products": ["6"]
                }
            ]
        },
        "7": {
            "id": "7",
            "options": [{
                    "id": "8",
                    "products": ["4"]
                }, {
                    "id": "9",
                    "products": ["10"]
                }
            ]
        }
    },
    "template": "price",
}
//属性2
var arr2 = {
    "7": {
        "8": [
            "4"
        ],
        "9": [
            "10"
        ]
    },
    "1": {
        "2": [
            "4",
            "5"
        ],
        "3": [
            "6"
        ]
    }
}
//仓库
var arr3 = {
    "4": {
        "qty": "5",
        "html": "

        Warehouse1
        "
    },
    "5": {
        "qty": "6",
        "html": "
        Warehouse2
        "
    },
    "6": {
        "qty": "22",
        "html": "
        Warehouse3
        "
    },
    "10": {
        "qty": "13",
        "html": "
        Warehouse4
        "
    }
}

<dl>
    <dt>
        <label>属性1</label>
    </dt>
    <dd>
        <select name="super_attribute[1]" id="attribute1">
            <option value="">Choose an Option...</option>
            <option value="2">0.04Ohm</option>
            <option value="3">0.05Ohm</option>
        </select>
    </dd>
    <dt>
        <label>属性2</label>
    </dt>
    <dd>
        <select name="super_attribute[7]" id="attribute7">
            <option value="">Choose an Option...</option>
            <option value="8">Black</option>
            <option value="9">Red</option>
        </select>
    </dd>
    <dt>
        <label>Warehouse</label>
    </dt>
    <dd>
        <!--根据上面选择的属性值显示对应的仓库内容-->
    </dd>
</dl>
<dl>
    <dt>
        <label>属性1</label>
    </dt>
    <dd>
        <select name="super_attribute[1]" id="attribute1">
            <option value="">Choose an Option...</option>
            <option value="2">0.04Ohm</option>
            <option value="3">0.05Ohm</option>
        </select>
    </dd>
    <dt>
        <label>属性2</label>
    </dt>
    <dd>
        <select name="super_attribute[7]" id="attribute7">
            <option value="">Choose an Option...</option>
            <option value="8">Black</option>
            <option value="9">Red</option>
        </select>
    </dd>
    <dt>
        <label>Warehouse</label>
    </dt>
    <dd>
        <!--根据上面选择的属性值显示对应的仓库内容-->
    </dd>
</dl>

知识考察点：遍历对象，遍历数组的用法

案例：
var A = {a:1,b:2,c:3,d:"hello world"};

for(var k in A) {

console.log(k,A[k]);

}
输出内容：
a 1
b 2
c 3
d hello world