// 接下來寫一個 類似的layer彈框插件；
        function Layer (data){
            if(!data){
                return;
            }          
            // 創(chuàng)建HTML頁面代碼
            // 創(chuàng)建最外層盒子 樣式寫在 common.css中
            this.LayerBox = document.createElement('div');
            this.LayerBox.className = 'layerBox';
            // 創(chuàng)建一個title 盒子
            this.LayerTitle = document.createElement('div'); 
            this.LayerTitle.className = "layerTitle";
            // 創(chuàng)建內(nèi)容盒子
            this.LayerContent = document.createElement('div');
            this.LayerContent.className = "layerContent"; 
            // 創(chuàng)建一個 確定按鈕盒子
            this.LayerConfirmBox = document.createElement('div'); 
            this.LayerConfirmBox.className = "layerConfirmBox";
            this.LayerConfirmBtn = document.createElement('a');
            // 創(chuàng)建關(guān)閉彈框按鈕HTML代碼
            this.LayerCloseBox = document.createElement('span');
            this.LayerCloseBox.className = "layerCloseBox";
            this.LayerCloseIcon = document.createElement('i');
            // 創(chuàng)建朦朧層HTML代碼
            this.LayerHazyBox = document.createElement('div');
            this.LayerHazyBox.className = "layerHazyBox"
            // 定義盒子內(nèi)容
            this.title = data.title;
            this.content = data.content; 
            this.btnText = data.btnText;
            this.LayerTitle.innerHTML = this.content || "信息";
            this.LayerConfirmBtn.innerHTML = this.btnText || "確定";
            this.LayerContent.innerHTML = this.content || "默認(rèn)信息";
            // 添加一個確定后的回調(diào)函數(shù)
            this.success = data.success || function(){};
            // 添加一個關(guān)閉彈框的回調(diào)函數(shù)
            this.close = data.close || function(){};
        }
        Layer.prototype = {
            init : function(){
                this.LayerBox.appendChild(this.LayerTitle);
                this.LayerBox.appendChild(this.LayerContent);
                this.LayerBox.appendChild(this.LayerConfirmBox);
                this.LayerBox.appendChild(this.LayerCloseBox);
                this.LayerCloseBox.appendChild(this.LayerCloseIcon);
                this.LayerConfirmBox.appendChild(this.LayerConfirmBtn);
                document.body.appendChild(this.LayerBox);
                document.body.appendChild(this.LayerHazyBox);
                // 讓彈框出現(xiàn)
                this.show();
                // 確定跟關(guān)閉盒子綁定事件
                this.bindEvent();
            },
            bindEvent : function(){
                // 給 確定 跟 x 綁定事件
                let _this = this;
                this.LayerConfirmBtn.onclick = function(){
                    _this.success();
                    _this.hide();
                }
                this.LayerCloseIcon.onclick = function(){
                    _this.close();
                    _this.hide();
                }
            },
            show : function(){
                this.LayerBox.style.display = "block";
                this.LayerHazyBox.style.display = "block";
            },
            hide : function(){
                this.LayerBox.style.display = "none";
                this.LayerHazyBox.style.display = "none";
                // 讓HTML代碼刪除
                document.body.removeChild(this.LayerBox);
                document.body.removeChild(this.LayerHazyBox);
            }
        }

        var btn = document.getElementById('btn');
        btn.onclick = function(){
            new Layer({
                title:"",
                content:"你好灸拍！",
                success:function(){
                    alert('確定后執(zhí)行函數(shù)');
                },
                close:function(){
                    alert('點擊關(guān)閉執(zhí)行函數(shù)');
                }
            }).init();
        }

        // 使用子類繼承 父類 抽象 改變父類結(jié)構(gòu)
        // 給確定按鈕 添加一個取消按鈕
        function LayerInquiry (data){
            // 改變this指向
            Layer.call(this,data);
            // 這里this只的是父級 Layer
            // 創(chuàng)建一個取消按鈕
            this.LayerCloseBtn = document.createElement('a');
            this.btnCloseText = data.btnCloseText;
            this.LayerCloseBtn.innerHTML = this.btnCloseText || "取消";
        }
        // 原型鏈繼承父級所有方法
        LayerInquiry.prototype = new Layer();
        LayerInquiry.prototype.init = function(){
            // 改變初始化  取消按鈕添加到盒子
            this.LayerConfirmBox.appendChild(this.LayerCloseBtn);
            // 繼承父級原始的 init方法做祝；
            Layer.prototype.init.call(this);
        }
        LayerInquiry.prototype.bindEvent = function(){
            let _this = this;
            // 為創(chuàng)建的取消按鈕 添加綁定事件
            this.LayerCloseBtn.onclick = function(){
                _this.hide();
            }
            // 繼承父級原始的  bindEvent方法；
            Layer.prototype.bindEvent.call(this);
        }
        var btn2 = document.getElementById('btn2');
        btn2.onclick = function(){
            new LayerInquiry({
                title:"添加需求的Title",
                content:"添加取消了",
                success:function(){
                    alert('確定后執(zhí)行函數(shù)');
                },
                close:function(){
                    alert('點擊關(guān)閉執(zhí)行函數(shù)');
                }
            }).init();
        }