js实现遮罩层弹出框的方法

本文实例讲述了js实现遮罩层弹出框的方法。分享给大家供大家参考。具体分析如下：

昨天公司网站需要弹窗提示一些信息,要我在把弹窗的js代码和弹窗窗口html写在一起哪里需要就调用

不说那么多了,直接上代码,感觉肯定会有兼容问题,看到了请指出啊：

<style>

    #H-dialog{display:none;position:absolute;z-index: 9999999;width:400px;height: auto; background-color: #fff;}

    #H-dialog .close{float:right;font-size: 30px;margin-right: 10px;margin-top:5px;cursor:pointer;}

    #H-dialog .title{height: 40px;padding-left:10px; font-size:20px; line-height:40px;}

    #H-dialog #msgCont{height:36px; margin: 30px 0 50px;padding-left: 65px;font-size: 25px;line-height: 36px;vertical-align: middle; background: url(../Images/ui_alert.png) no-repeat 20px 50%;}

</style>

<div id="H-dialog">

    <a class="close" onclick="popupClose(this)">×</a>

    <div class="title">提示</div>

    <div id="msgCont">内容</div>

</div>
<script type="text/javascript">

    //锁定背景屏幕

    function lockScreen() {

        var clientH = document.body.offsetHeight; //body高度

        var clientW = document.body.offsetWidth; //body宽度

        var docH = document.body.scrollHeight; //浏览器高度

        var docW = document.body.scrollWidth; //浏览器宽度

        var bgW = clientW > docW ? clientW : docW; //取有效宽

        var bgH = clientH > docH ? clientH : docH; //取有效高

        var blackBg = document.createElement("div");

        blackBg.id = "blackBg";

        blackBg.style.position = "absolute";

        blackBg.style.zIndex = "99999";

        blackBg.style.top = "0";

        blackBg.style.left = "0";

        blackBg.style.width = bgW+"px";

        blackBg.style.height = bgH+"px";

        blackBg.style.opacity = "0.4";

        blackBg.style.backgroundColor = "#333";

        document.body.appendChild(blackBg);

    }

    //关闭按钮事件

    function popupClose(el) {

        var blackBg = document.getElementById("blackBg");

        blackBg && document.body.removeChild(blackBg);

        el.parentNode.style.display = "none";

    }

    //自动关闭

    function autoClose(id) {

        id = id || "H-dialog";

        var blackBg = document.getElementById("blackBg");

        var objDiv = document.getElementById(id);

        setTimeout(function(){

            blackBg && document.body.removeChild(blackBg);

            objDiv.style.display = "none";

        },2000);

    }

    /**

    *功能 : 弹窗信息

    *参数1 : 提示信息内容

    *参数2 : 提示信息状态默认0 为提示信息,1为成功信息

    *参数3 : 弹窗div的id,默认"H-dialog"

    *参数4 : 弹窗内容的id,默认"msgCont"

    **/

    function showMsg(msg) {

        msg = msg || "请重新操作";

        var status = arguments[1] || 0,

        popupId = arguments[2] || "H-dialog",

        contentId = arguments[3] || "msgCont";       

        lockScreen();

        //屏幕实际高宽

        var pageWidth = window.innerWidth;

        var pageHeight = window.innerHeight;

        if (typeof pageWidth != "number") {

            if (document.compatMode == "CSS1Compat") {

                pageWidth = document.documentElement.clientWidth;

                pageHeight = document.documentElement.clientHeight;

            } else {

                pageWidth = document.body.clientWidth;

                pageHeight = document.body.clientHeight;

            }

        }

        //滚动条高宽

        var scrollLeft = window.document.documentElement.scrollLeft;

        var scrollTop = 0;

        if (typeof window.pageYOffset != 'undefined') {

            scrollTop = window.pageYOffset;

        } else if (typeof window.document.compatMode != 'undefined' &&

            window.document.compatMode != 'BackCompat') {

            scrollTop = window.document.documentElement.scrollTop;

        } else if (typeof window.document.body != 'undefined') {

            scrollTop = window.document.body.scrollTop;

        }
        var div_X = (pageWidth - 400) / 2 + scrollLeft;

        var div_Y = (pageHeight - 200) / 2 + scrollTop;

        var objDiv = document.getElementById(popupId);

        if (status) {

            document.getElementById(contentId).style.background = "url($Root/Assets/Images/ui_success.png) no-repeat 20px 50%";

        }

        document.getElementById(contentId).innerHTML = msg;

        objDiv.style.display = "block";

        objDiv.style.left = div_X + "px";

        objDiv.style.top = div_Y + "px";

        autoClose(popupId);

    }

</script>

希望本文所述对大家的javascript程序设计有所帮助。