自定义弹窗Style样式_html/css_WEB-ITnose

由于系统默认alert弹出窗口不能自定义样式，有可能不符合网站的风格，虽然网上应该有很多这样的JS

但是还是自己写的比较放心，顺便练习一下对DOM的操作

支持IE6下的SELECT不能遮罩的问题，谷歌支持圆角，IE6下就比较丑了，四四方方的，不过可以自定义自己喜欢的样式

听取建议后，修改了position:fixed, IE6下用hack处理了。

点击看效果:

点击模拟Alert弹出框

点击模拟Alert弹出框

点击模拟Alert弹出框

所需CSS：

    <style type="text/css">        #alertMsg {            display: none;            width: 400px;            border: 1px solid #ddd;            border-radius: 5px;            box-shadow: 1px 1px 10px black;            padding: 10px;            font-size: 12px;            position: absolute;            text-align: center;            background: #fff;            z-index: 100000;        }        #alertMsg_info {            padding: 2px 15px;            line-height: 1.6em;            text-align: left;        }        #alertMsg_btn1, #alertMsg_btn2 {            display: inline-block;            background: url(images/gray_btn.png) no-repeat left top;            padding-left: 3px;            color: #000000;            font-size: 12px;            text-decoration: none;            margin-right: 10px;            cursor: pointer;        }        #alertMsg_btn1 cite, #alertMsg_btn2 cite {            line-height: 24px;            display: inline-block;            padding: 0 13px 0 10px;            background: url(images/gray_btn.png) no-repeat right top;            font-style: normal;        }    </style>

使用方法，直接调用函数，传递所需定义的信息，支持定义是否有取消键：

alertMsg(msg, mode)  //mode为空，即只有一个确认按钮，mode为1时有确认和取消两个按钮

点击模拟Alert弹出框

点击模拟Alert弹出框

点击模拟Alert弹出框

函数代码：添加了一个获取窗口尺寸的函数，又长长了很多，可以把获取窗口的尺寸另外立一个函数放公共库里面，这里只是为了方便演示，写到一个函数里面

function alertMsg(msg, mode) { //mode为空，即只有一个确认按钮，mode为1时有确认和取消两个按钮        msg = msg || '';        mode = mode || 0;        var top = document.body.scrollTop || document.documentElement.scrollTop;        var isIe = (document.all) ? true : false;        var isIE6 = isIe && !window.XMLHttpRequest;        var sTop = document.documentElement.scrollTop || document.body.scrollTop;        var sLeft = document.documentElement.scrollLeft || document.body.scrollLeft;        var winSize = function(){            var xScroll, yScroll, windowWidth, windowHeight, pageWidth, pageHeight;            // innerHeight获取的是可视窗口的高度，IE不支持此属性            if (window.innerHeight && window.scrollMaxY) {                xScroll = document.body.scrollWidth;                yScroll = window.innerHeight + window.scrollMaxY;            } else if (document.body.scrollHeight > document.body.offsetHeight) { // all but Explorer Mac                xScroll = document.body.scrollWidth;                yScroll = document.body.scrollHeight;            } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari                xScroll = document.body.offsetWidth;                yScroll = document.body.offsetHeight;            }            if (self.innerHeight) {    // all except Explorer                windowWidth = self.innerWidth;                windowHeight = self.innerHeight;            } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode                windowWidth = document.documentElement.clientWidth;                windowHeight = document.documentElement.clientHeight;            } else if (document.body) { // other Explorers                windowWidth = document.body.clientWidth;                windowHeight = document.body.clientHeight;            }            // for small pages with total height less then height of the viewport            if (yScroll < windowHeight) {                pageHeight = windowHeight;            } else {                pageHeight = yScroll;            }            // for small pages with total width less then width of the viewport            if (xScroll < windowWidth) {                pageWidth = windowWidth;            } else {                pageWidth = xScroll;            }            return{                'pageWidth':pageWidth,                'pageHeight':pageHeight,                'windowWidth':windowWidth,                'windowHeight':windowHeight            }        }();        //alert(winSize.pageWidth);        //遮罩层        var styleStr = 'top:0;left:0;position:absolute;z-index:10000;background:#666;width:' + winSize.pageWidth + 'px;height:' +  (winSize.pageHeight + 30) + 'px;';        styleStr += (isIe) ? "filter:alpha(opacity=80);" : "opacity:0.8;"; //遮罩层DIV        var shadowDiv = document.createElement('div'); //添加阴影DIV        shadowDiv.style.cssText = styleStr; //添加样式        shadowDiv.id = "shadowDiv";        //如果是IE6则创建IFRAME遮罩SELECT        if (isIE6) {            var maskIframe = document.createElement('iframe');            maskIframe.style.cssText = 'width:' + winSize.pageWidth + 'px;height:' + (winSize.pageHeight + 30) + 'px;position:absolute;visibility:inherit;z-index:-1;filter:alpha(opacity=0);';            maskIframe.frameborder = 0;            maskIframe.src = "about:blank";            shadowDiv.appendChild(maskIframe);        }        document.body.insertBefore(shadowDiv, document.body.firstChild); //遮罩层加入文档        //弹出框        var styleStr1 = 'display:block;position:fixed;_position:absolute;left:' + (winSize.windowWidth / 2 - 200) + 'px;top:' + (winSize.windowHeight / 2 - 150) + 'px;_top:' + (winSize.windowHeight / 2 + top - 150)+ 'px;'; //弹出框的位置        var alertBox = document.createElement('div');        alertBox.id = 'alertMsg';        alertBox.style.cssText = styleStr1;        //创建弹出框里面的内容P标签        var alertMsg_info = document.createElement('P');        alertMsg_info.id = 'alertMsg_info';        alertMsg_info.innerHTML = msg;        alertBox.appendChild(alertMsg_info);        //创建按钮        var btn1 = document.createElement('a');        btn1.id = 'alertMsg_btn1';        btn1.href = 'javas' + 'cript:void(0)';        btn1.innerHTML = '<cite>确定</cite>';        btn1.onclick = function () {            document.body.removeChild(alertBox);            document.body.removeChild(shadowDiv);            return true;        };        alertBox.appendChild(btn1);        if (mode === 1) {            var btn2 = document.createElement('a');            btn2.id = 'alertMsg_btn2';            btn2.href = 'javas' + 'cript:void(0)';            btn2.innerHTML = '<cite>取消</cite>';            btn2.onclick = function () {                document.body.removeChild(alertBox);                document.body.removeChild(shadowDiv);                return false;            };            alertBox.appendChild(btn2);        }        document.body.appendChild(alertBox);    }

点击模拟Alert弹出框

点击模拟Alert弹出框

点击模拟Alert弹出框