原生Js封装的弹出框-弹出窗口-页面居中-多状态可选

实现了一下功能：

1.title可自定义 可拖拽

2.width height可以自定义

3.背景遮罩和透明度可以自定义

4.可以自己编辑弹出框里的html

5.确定 取消按钮可选

调用方法：

 1 Prompt.add();//生成遮罩和弹出div
 2 
 3 
 4 
 5 Prompt.init({    //修改参数
 6         title : "我是个alert弹出框",
 7         shade : true,
 8         opacity : 20,
 9         width : 800,
10         height : 150,
11      ConfirmFun : a1,
12         CancelFun : a2,
13         html : "我是个alert弹出框我是个alert弹出框我是个alert弹出框我是个alert弹出框我是个alert弹出框我是个alert弹出框!"
14     });

在线效果预览：http://jsfiddle.net/dtdxrk/A2trz/embedded/result/

<!DOCTYPE HTML>
  <html lang="en">
  <head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>原生Js封装的弹出框-弹出窗口-页面居中-多状态可选</title>
<style type="text/css">
  *{margin:0;padding: 0;}
  body{height: 2000px;}
  #txt {background-color: green;padding: 5px;line-height: 1.5;color: #fff;}

    div#shadeDiv{display:none;position: absolute;top: 0;left: 0; opacity: 1; filter: alpha(opacity=100);z-index: 9998;background-color: #000;}
    div#prompt{border-radius:5px; display:none;border: 1px solid #CCC; position:fixed;_position: absolute;z-index: 9999;background-color: #fff;}
    div#prompt_title{ cursor:move;border-radius:5px;font-size:14px;font-weight: bold;color: #333;padding-left:10px;height: 35px;line-height: 35px;border-bottom: 1px solid #ececec;background-color:#fcfcfc; }
    span#prompt_close{ position: absolute;right: 10px;top: 10px; cursor: pointer; background: url("bd_split_210d2d99.gif") no-repeat -281px -41px; width: 14px;height: 13px;outline: none;display: block;}
    div#prompt_body{padding: 30px 20px;font-size:13px;line-height: 1.5;}
    div#prompt_bottom{display:none;position: absolute;bottom: 15px;right: 15px;}
    div#prompt_bottom a.btn{_display:block;_float:left;border: 1px solid #888;border-radius:2px;font-size: 13px;padding: 5px 8px ;margin-left: 10px;cursor: pointer;
color: #000000;
color: #000000!important;
background: #F3F3F3;
background: -moz-linear-gradient(top,#ffffff 0%,#ebebeb 90%,#F3F3F3 100%);
background: -webkit-linear-gradient(top,#ffffff 0%,#ebebeb 90%,#F3F3F3 100%);
background: -o-linear-gradient(top,#ffffff 0%,#ebebeb 90%,#F3F3F3 100%);
background: -ms-linear-gradient(top,#ffffff 0%,#ebebeb 90%,#F3F3F3 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff',endColorstr='#d7d7d7',GradientType=0 );
background: linear-gradient(top,#ffffff 0%,#ebebeb 90%,#F3F3F3 100%);}
    div#prompt_bottom a.btn:hover{border: 1px solid blue;}
</style>
  <body>

  <div id="txt">
    <h1>需要实现的状态</h1>
    <p>1.是否有遮罩层</p>
    <p>2.是否有title</p>
    <p>3.alert & confirm</p>
    <p>4.自定义弹出框里面的html</p>
    <p>5.拖拽</p>
  </div>

<button id="bt1" style="margin-top:200px;">有遮罩的alert弹出框</button>
<button id="bt2">没有标题和遮罩的confirm弹出框</button>

  <select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6" >
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6" >
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<input type="text" class="cityinput" id="city2" value="城市名">
<select name="IE6" >
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6" >
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<br/>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6" >
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6" >
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<br/>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<br/>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<br/>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<select name="IE6">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>

<button id="bt3">有确定按钮的alert弹出框</button>
<button id="bt4">自定义html内容的弹出框</button>

<script type="text/javascript">

var Prompt = {
  $ : function(id){return document.getElementById(id)},
  add : function(){ //生成div和遮罩层
    this.createShade();
    this.createPrompt();
  },
  init :function(option){   
    var title = this.title = option.title || false,
        shade = this.shade = option.shade || false,  //是否显示遮罩
        opacity = this.opacity = option.opacity || 20, //遮罩透明度
        width = this.width = option.width || 500,
        height = this.height = option.height || 300,
        _temp = this._temp = option.html || "",
        ConfirmFun = this.ConfirmFun = option.ConfirmFun || false,
        CancelFun = this.CancelFun = option.CancelFun || false;
    this.editTitle();
    this.editHtml();
    if(ConfirmFun){ 
        this.showBottom();
    }else{
        this.hideBottom();
    }
    this.show();
  },
  editTitle : function(){   //title div生成
    var prompt_title = this.$("prompt_title");
    if(this.title){
        prompt_title.innerHTML = this.title;
        //添加拖拽方法
        this.drag();
        prompt_title.style.display = "block";
    }else{
        prompt_title.style.display = "none";
    }
  },
  editHtml : function(){
    var prompt_body = this.$("prompt_body");
    prompt_body.innerHTML = this._temp;
  },
  createPrompt : function(){    //创建弹出的div
    var doc = document,
        Div = doc.createElement("div");
    Div.id = "prompt";
    Div.innerHTML = "<span id='prompt_close'></span><div id='prompt_title'></div><div id='prompt_body'></div><div id='prompt_bottom'></div>";
    doc.body.appendChild(Div);

    var prompt_close = this.$("prompt_close");
    this.addHandler(prompt_close,"click",this.hide);
  },
  showBottom : function(){    //创建确定 取消按钮
    var that = this,
        prompt_bottom = that.$("prompt_bottom");

    if(that.CancelFun){
        prompt_bottom.innerHTML = "<a class='btn' id='ConfirmFun'>确定</a><a class='btn' id='CancelFun'>取消</a>";
        that.addHandler(that.$("ConfirmFun"),"click",function(){
            that.hide();
            that.ConfirmFun();
        });

        that.addHandler(that.$("CancelFun"),"click",function(){
            that.hide();
            that.CancelFun();
        });
    }else{
        prompt_bottom.innerHTML = "<a class='btn' id='ConfirmFun'>确定</a>";
        that.addHandler(that.$("ConfirmFun"),"click",function(){
            that.hide();
            that.ConfirmFun();
        });
    }

    prompt_bottom.style.display = "block";
  },
  hideBottom : function(){
    this.$("prompt_bottom").innerHTML = "";
    this.$("prompt_bottom").style.display = "none";
  },
  show : function(){
    var promptDiv = Prompt.$("prompt"),
        shadeDiv = Prompt.$("shadeDiv"),
        bodyHeight = document.documentElement.clientHeight  || document.body.clientHeight ;
    promptDiv.style.display = "block";
    promptDiv.style.width = this.width + "px";
    promptDiv.style.height = this.height + "px";
    promptDiv.style.left = (this.bodyWidth/2-this.width/2)+  "px";
    promptDiv.style.top = (bodyHeight/2-this.height/2) +  "px";
    if(this.shade){
        shadeDiv.style.display = "block";
        if (document.all) {
             shadeDiv.filters.alpha.opacity = this.opacity;
             shadeDiv.style.zoom = 1 ;
        }else {
             shadeDiv.style.opacity = this.opacity / 100;
        }
    }
    if(this.IE6()) promptDiv.appendChild(this.createIframe());    //ie6添加iframe
  },
  hide : function(){
    Prompt.$("prompt").style.display = "none";
    Prompt.$("shadeDiv").style.display = "none";
  },
  createShade : function(){ //创建遮罩层
    var doc = document,
        bodyWidth = this.bodyWidth = doc.documentElement.clientWidth || doc.body.clientWidth,
        bodyHeight = this.bodyHeight = doc.documentElement.scrollHeight || doc.body.scrollHeight,
        Div = doc.createElement("div");
    Div.id = "shadeDiv";
    Div.style.height = bodyHeight + "px";
    Div.style.width = bodyWidth + "px";
    Div.style.opacity = 0.2;
    if(this.IE6()) Div.appendChild(this.createIframe("shadeDiv"));    //ie6添加iframe
    doc.body.appendChild(Div);
  },
  createIframe : function(div){
    var width,height;
    if(div == "shadeDiv"){
        width = this.bodyWidth;
        height = this.bodyHeight;
    }else{
        width = this.width;
        height = this.height;
    }
    var Iframe =  document.createElement('iframe');
    Iframe.style.position = 'absolute';
    Iframe.style.zIndex = '-1';
    Iframe.style.left = '-1px';
    Iframe.style.top = 0;
    Iframe.style.border = 0;
    Iframe.style.filter = 'alpha(opacity=0)';
    Iframe.style.width = width + 'px';
    Iframe.style.height = height + 'px';
    return Iframe;
  },
  isDown : false,
  drag : function(){    //添加拖拽事件
    var that = this,
        mouseX,mouseY,objY,objX,
        prompt_title = this.$("prompt_title"),
        prompt = this.$("prompt");

    that.addHandler(prompt_title,"mousedown",function(event){
        var event = window.event || event;
        if(event.button == 0 || event.button==1){  //鼠标左键chrome=0 ie=1
            (!window.ActiveXObject) ? event.preventDefault() : event.returnValue = false; //取消默认行为
            mouseX = event.clientX;
            mouseY = event.clientY;
            objY = parseInt(prompt.style.top);
            objX = parseInt(prompt.style.left);
            that.isDown = true;
        }
    });

    that.addHandler(document,"mousemove",function(event){
        if(that.isDown){
            var event = window.event || event;
            // (!window.ActiveXObject) ? event.preventDefault() : event.returnValue = false; //取消默认行为
            prompt.style.top = event.clientY - mouseY + objY + "px";
            prompt.style.left = event.clientX - mouseX + objX + "px";
        }
    });

    that.addHandler(document,"mouseup",function(){
       that.isDown = false;
    });
  },
  getPosition : function(obj) { //获取元素在页面里的位置和宽高
      var top = 0,
          left = 0,
          width = obj.offsetWidth,
          height = obj.offsetHeight;
  
      while(obj.offsetParent){
          top += obj.offsetTop;
          left += obj.offsetLeft;
          obj = obj.offsetParent;
      }
  
      return {"top":top,"left":left,"width":width,"height":height};
  },
  addHandler:function(node, type, handler){
       node.addEventListener ? node.addEventListener(type, handler, false) : node.attachEvent('on'+ type, handler);
  },
  IE6 : function(){
      return !!window.ActiveXObject && !window.XMLHttpRequest;
  }

}

Prompt.add();

document.getElementById("bt1").onclick = function(){
    Prompt.init({
        title : "我是个alert弹出框",
        shade : true,
        opacity : 20,
        width : 800,
        height : 150,
        html : "我是个alert弹出框我是个alert弹出框我是个alert弹出框我是个alert弹出框我是个alert弹出框我是个alert弹出框!"
    });
}

document.getElementById("bt2").onclick = function(){
    Prompt.init({
        height: 200,
        html : "没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!",
        ConfirmFun : a1,
        CancelFun : a2 
    });
}

document.getElementById("bt3").onclick = function(){
    Prompt.init({
        title : "有确定按钮的弹出框",
        height: 200,
        html : "没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!没有标题和遮罩的confirm弹出框!",
        ConfirmFun :  a1
    });
}

document.getElementById("bt4").onclick = function(){
    var str = "<h1>需要实现的状态</h1>" +
        "<p>1.是否有遮罩层</p>" +
        "<p>2.是否有title</p>" +
        "<p>3.alert & confirm</p>" +
        "<p>4.自定义弹出框里面的html</p>" +
        "<p>5.拖拽</p>" +
        "<select name='IE6'>" +
            "<option>1</option>" +
            "<option>2</option>" +
            "<option>3</option>" +
        "</select>" +
        "<br>" +
        "<h2>可以自己添加修改css样式</h2>" +
        "<iframe src='http://www.baidu.com' width='900' height='200'></iframe>" +
        "<h6>也可以自己添加方法</h6>";
    Prompt.init({
        title :"自定义html内容的弹出框",
        shade : true,
        opacity : 20,
        width :1000,
        height: 500,
        html : str
    });
}


function a1(){
    Prompt.init({
        title : "我是确认弹出框",
        shade : true,
        height : 150,
        html : "我是确认弹出框!"
    });
}

function a2(){
    Prompt.init({
        title : "我是取消的弹出框",
        shade : true,
        opacity : 20,
        width : 200,
        height : 150,
        html : "我是取消的弹出框"
    });
}
</script>
  
</body>
</html>
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原文地址：https://www.cnblogs.com/dtdxrk/p/3254026.html