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JavaScript 仿LightBox内容显示效果

发布时间：2017-09-15 编辑：jiaochengji.com

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<textarea name="runcool" rows="28" cols="75" >JavaScript 仿LightBox内容显示效果 <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>JavaScript 仿LightBox内容显示效果</title> </head> <body>

<script> var isIE = (document.all) ? true : false; var isIE6 = isIE && ([/MSIE (d).0/i.exec(navigator.userAgent)][0][1] == 6); var $ = function (id) { return "string" == typeof id ? document.getElementById(id) : id; }; var Class = { create: function() { return function() { this.initialize.apply(this, arguments); } } } var Extend = function(destination, source) { for (var property in source) { destination[property] = source[property]; } } var Bind = function(object, fun) { return function() { return fun.apply(object, arguments); } } var Each = function(list, fun){ for (var i = 0, len = list.length; i < len; i ) { fun(list[i], i); } }; var Contains = function(a, b){ return a.contains ? a != b && a.contains(b) : !!(a.compareDocumentPosition(b) & 16); } var OverLay = Class.create(); OverLay.prototype = { initialize: function(options) { this.SetOptions(options); this.Lay = $(this.options.Lay) || document.body.insertBefore(document.createElement("div"), document.body.childNodes[0]); this.Color = this.options.Color; this.Opacity = parseInt(this.options.Opacity); this.zIndex = parseInt(this.options.zIndex); with(this.Lay.style){ display = "none"; zIndex = this.zIndex; left = top = 0; position = "fixed"; width = height = "100%"; } if(isIE6){ this.Lay.style.position = "absolute"; //ie6设置覆盖层大小程序 this._resize = Bind(this, function(){ this.Lay.style.width = Math.max(document.documentElement.scrollWidth, document.documentElement.clientWidth) "px"; this.Lay.style.height = Math.max(document.documentElement.scrollHeight, document.documentElement.clientHeight) "px"; }); //遮盖select this.Lay.innerHTML = '<iframe style="position:absolute;top:0;left:0;width:100%;height:100%;filter:alpha(opacity=0);"></iframe>' } }, //设置默认属性 SetOptions: function(options) { this.options = {//默认值 Lay: null,//覆盖层对象 Color: "#fff",//背景色 Opacity: 50,//透明度(0-100) zIndex: 1000//层叠顺序 }; Extend(this.options, options || {}); }, //显示 Show: function() { //兼容ie6 if(isIE6){ this._resize(); window.attachEvent("onresize", this._resize); } //设置样式 with(this.Lay.style){ //设置透明度 isIE ? filter = "alpha(opacity:" this.Opacity ")" : opacity = this.Opacity / 100; backgroundColor = this.Color; display = "block"; } }, //关闭 Close: function() { this.Lay.style.display = "none"; if(isIE6){ window.detachEvent("onresize", this._resize); } } }; var LightBox = Class.create(); LightBox.prototype = { initialize: function(box, options) { this.Box = $(box);//显示层 this.OverLay = new OverLay(options);//覆盖层 this.SetOptions(options); this.Fixed = !!this.options.Fixed; this.Over = !!this.options.Over; this.Center = !!this.options.Center; this.onShow = this.options.onShow; this.Box.style.zIndex = this.OverLay.zIndex 1; this.Box.style.display = "none"; //兼容ie6用的属性 if(isIE6){ this._top = this._left = 0; this._select = []; this._fixed = Bind(this, function(){ this.Center ? this.SetCenter() : this.SetFixed(); }); } }, //设置默认属性 SetOptions: function(options) { this.options = {//默认值 Over: true,//是否显示覆盖层 Fixed: false,//是否固定定位 Center: false,//是否居中 onShow: function(){}//显示时执行 }; Extend(this.options, options || {}); }, //兼容ie6的固定定位程序 SetFixed: function(){ this.Box.style.top = document.documentElement.scrollTop - this._top this.Box.offsetTop "px"; this.Box.style.left = document.documentElement.scrollLeft - this._left this.Box.offsetLeft "px"; this._top = document.documentElement.scrollTop; this._left = document.documentElement.scrollLeft; }, //兼容ie6的居中定位程序 SetCenter: function(){ this.Box.style.marginTop = document.documentElement.scrollTop - this.Box.offsetHeight / 2 "px"; this.Box.style.marginLeft = document.documentElement.scrollLeft - this.Box.offsetWidth / 2 "px"; }, //显示 Show: function(options) { //固定定位 this.Box.style.position = this.Fixed && !isIE6 ? "fixed" : "absolute"; //覆盖层 this.Over && this.OverLay.Show(); this.Box.style.display = "block"; //居中 if(this.Center){ this.Box.style.top = this.Box.style.left = "50%"; //设置margin if(this.Fixed){ this.Box.style.marginTop = - this.Box.offsetHeight / 2 "px"; this.Box.style.marginLeft = - this.Box.offsetWidth / 2 "px"; }else{ this.SetCenter(); } } //兼容ie6 if(isIE6){ if(!this.Over){ //没有覆盖层ie6需要把不在Box上的select隐藏 this._select.length = 0; Each(document.getElementsByTagName("select"), Bind(this, function(o){ if(!Contains(this.Box, o)){ o.style.visibility = "hidden"; this._select.push(o); } })) } //设置显示位置 this.Center ? this.SetCenter() : this.Fixed && this.SetFixed(); //设置定位 this.Fixed && window.attachEvent("onscroll", this._fixed); } this.onShow(); }, //关闭 Close: function() { this.Box.style.display = "none"; this.OverLay.Close(); if(isIE6){ window.detachEvent("onscroll", this._fixed); Each(this._select, function(o){ o.style.visibility = "visible"; }); } } }; </script> <style> .lightbox{width:300px;background:#FFFFFF;border:1px solid #ccc;line-height:25px; top:20%; left:20%;} .lightbox dt{background:#f4f4f4; padding:5px;} </style>

<select> <option>覆盖select测试</option> </select>

<script> var box = new LightBox("idBox"); $("idBoxCancel").onclick = function(){ box.Close(); } $("idBoxOpen").onclick = function(){ box.Show(); } $("btnOverlay").onclick = function(){ box.Close(); if(box.Over){ box.Over = false; this.value = "打开覆盖层"; } else { box.Over = true; this.value = "关闭覆盖层"; } } $("btnOverColor").onclick = function(){ box.Close(); box.Over = true; if(box.OverLay.Color == "#fff"){ box.OverLay.Color = "#000"; this.value = "白色覆盖层"; } else { box.OverLay.Color = "#fff" this.value = "黑色覆盖层"; } } $("btnOverOpacity").onclick = function(){ box.Close(); box.Over = true; if(box.OverLay.Opacity == 0){ box.OverLay.Opacity = 50; this.value = "全透覆盖层"; } else { box.OverLay.Opacity = 0; this.value = "半透覆盖层"; } } $("btnFixed").onclick = function(){ box.Close(); if(box.Fixed){ box.Fixed = false; this.value = "定位效果"; } else { box.Fixed = true; this.value = "取消定位"; } } $("btnCenter").onclick = function(){ box.Close(); if(box.Center){ box.Center = false; box.Box.style.left = box.Box.style.top = "20%"; box.Box.style.marginTop = box.Box.style.marginLeft = "0"; this.value = "居中效果"; } else { box.Center = true; this.value = "重新定位"; } } </script> </body> </html> </textarea>

提示：您可以先修改部分代码再运行

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