本文实例讲述了jQuery实现的自定义弹出层效果。分享给大家供大家参考，具体如下：
dialog.css：
#DialogBySHFLayer
{
width:100%;
height:100%;
left:0;
top:0;
position:fixed;
z-index:500;
background-color:#333333;
filter:alpha(Opacity=40);
-moz-opacity:0.4;
opacity: 0.4;
}
/*弹出的提示框*/
#DialogBySHF
{
position:absolute;
border-radius:3px;
box-shadow:0 0 8px rgba(0, 0, 0, .8);
background-color:#f2f2f2;
z-index:600;
}
#DialogBySHF #Title
{
margin:0;
width:100%;
height:35px;
background-color:#ffa500;
color:#FFFFFF;
font-family: 'microsoft yahei';
font-size:18px;
text-align:center;
cursor:move;
line-height:35px;
border-radius:3px 3px 0 0;
-moz-user-select:none;
-webkit-user-select:none;
user-select:none;
}
#DialogBySHF #Close
{
position:absolute;
right:7px;
top:6px;
height:21px;
line-height:21px;
width:21px;
cursor:pointer;
display:block;
border:1px solid #da8e02;
box-shadow:0 0 4px rgba(255, 255, 255, .9);
border-radius:3px;
}
#DialogBySHF #Container
{
padding:0px 5px 5px 5px;
/*width:390px;
height:355px;*/
}
#DialogBySHF #Container table,#DialogBySHF #Container iframe
{
width:100%;
height:100%;
}
#DialogBySHF #Container table td
{
vertical-align:middle;
}
#DialogBySHF #Container table #TipLine
{
padding:0 30px;
font-family: 'microsoft yahei';
}
#DialogBySHF #Container table #BtnLine
{
height:60px;
text-align:center;
}
#DialogBySHF #Container table #BtnLine input
{
margin:6px 11px;
-moz-user-select: none;
background-color:#F5F5F5;
background-image: -moz-linear-gradient(center top , #F5F5F5, #F1F1F1);
background-image:-ms-linear-gradient(rgb(245, 245, 245), rgb(241, 241, 241));
background-image:-webkit-linear-gradient(top,#f8f8f8,#f1f1f1);
border:1px solid rgba(0,0,0,0.1);
*border:1px solid #DDDDDD;
border:1px solid #DDDDDD\0;
border-radius:2px;
font-family: 'microsoft yahei';
color:#666666;
cursor:default;
font-size:12px;
font-weight:bold;
height:29px;
line-height:27px;
min-width:54px;
padding:0 8px;
text-align:center;
}
#DialogBySHF #Container table #BtnLine input:hover
{
background-color: #F8F8F8;
background-image: -moz-linear-gradient(center top , #F8F8F8, #F1F1F1);
border: 1px solid #C6C6C6;
box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
color: #333333;
}
#DialogBySHF #Container table #BtnLine input:focus
{
border: 1px solid #4D90FE;
outline: medium none;
}
dialog.js：
;(function ($) {
//默认参数
var PARAMS;
var DEFAULTPARAMS = { Title: "弹出层的标题", Content: "", Width: 400, Height: 300, URL: "", ConfirmFun: new Object, CancelFun: new Object };
var ContentWidth = 0;
var ContentHeight = 0;
$.DialogBySHF = {
//弹出提示框
Alert: function (params) {
Show(params, "Alert");
},
//弹出确认框
Confirm: function (params) { Show(params, "Confirm"); },
//弹出引用其他URL框
Dialog: function (params) { Show(params, "Dialog") },
//关闭弹出框
Close: function () {
$("#DialogBySHFLayer,#DialogBySHF").remove();
}
};
//初始化参数
function Init(params) {
if (params != undefined && params != null) {
PARAMS = $.extend({},DEFAULTPARAMS, params);
}
ContentWidth = PARAMS.Width - 10;
ContentHeight = PARAMS.Height - 40;
};
//显示弹出框
function Show(params, caller) {
Init(params);
var screenWidth = $(window).width();
var screenHeight = $(window).height();
//在屏幕中显示的位置（正中间）
var positionLeft = (screenWidth - PARAMS.Width) / 2 $(document).scrollLeft();
var positionTop = (screenHeight - PARAMS.Height) / 2 $(document).scrollTop();
var Content = [];
Content.push("<div id=\"DialogBySHFLayer\"></div>");
Content.push("<div id=\"DialogBySHF\" style=\"width:" PARAMS.Width "px;height:" PARAMS.Height "px;left:" positionLeft "px;top:" positionTop "px;\">");
Content.push(" <div id=\"Title\"><span>" PARAMS.Title "</span><span id=\"Close\">✕</span></div>");
Content.push(" <div id=\"Container\" style=\"width:" ContentWidth "px;height:" ContentHeight "px;\">");
if (caller == "Dialog") {
Content.push("<iframe frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" src=\"" PARAMS.URL "\" ></iframe>");
}
else {
var TipLineHeight = ContentHeight - 60;
Content.push(" <table>");
Content.push(" <tr><td id=\"TipLine\" style=\"height:" TipLineHeight "px;\">" PARAMS.Content "</td></tr>");
Content.push(" <tr>");
Content.push(" <td id=\"BtnLine\">");
Content.push(" <input type=\"button\" id=\"btnDialogBySHFConfirm\" value=\"确定\" />");
if (caller == "Confirm") {
Content.push(" <input type=\"button\" id=\"btnDialogBySHFCancel\" value=\"取消\" />");
}
Content.push(" </td>");
Content.push(" </tr>");
Content.push(" </table>");
}
Content.push(" </div>");
Content.push("</div>");
$("body").append(Content.join("\n"));
SetDialogEvent(caller);
}
//设置弹窗事件
function SetDialogEvent(caller) {
//添加按钮关闭事件
$("#DialogBySHF #Close").click(function () { $.DialogBySHF.Close();});
//添加ESC关闭事件
$(window).keydown(function(event){
var event = event||window.event;
if(event.keyCode===27){
$.DialogBySHF.Close();
}
});
//添加窗口resize时调整对话框位置
$(window).resize(function(){
var screenWidth = $(window).width();
var screenHeight = $(window).height();
var positionLeft = parseInt((screenWidth - PARAMS.Width) / 2 $(document).scrollLeft());
var positionTop = parseInt((screenHeight - PARAMS.Height) / 2 $(document).scrollTop());
$("#DialogBySHF").css({"top":positionTop "px","left":positionLeft "px"});
});
$("#DialogBySHF #Title").DragBySHF($("#DialogBySHF"));
if (caller != "Dialog") {
$("#DialogBySHF #btnDialogBySHFConfirm").click(function () {
$.DialogBySHF.Close();
if ($.isFunction(PARAMS.ConfirmFun)) {
PARAMS.ConfirmFun();
}
})
}
if (caller == "Confirm") {
$("#DialogBySHF #btnDialogBySHFCancel").click(function () {
$.DialogBySHF.Close();
if ($.isFunction(PARAMS.CancelFun)) {
PARAMS.CancelFun();
}
})
}
}
})(jQuery);
//拖动层
(function ($) {
$.fn.extend({
DragBySHF: function (objMoved) {
return this.each(function () {
//鼠标按下时的位置
var mouseDownPosiX;
var mouseDownPosiY;
//移动的对象的初始位置
var objPosiX;
var objPosiY;
//移动的对象
var obj = $(objMoved) == undefined ? $(this) : $(objMoved);
//是否处于移动状态
var status = false;
//鼠标移动时计算移动的位置
var tempX;
var tempY;
$(this).mousedown(function (e) {
status = true;
mouseDownPosiX = e.pageX;
mouseDownPosiY = e.pageY;
objPosiX = obj.css("left").replace("px", "");
objPosiY = obj.css("top").replace("px", "");
}).mouseup(function () {
status = false;
});
$("body").mousemove(function (e) {
if (status) {
tempX = parseInt(e.pageX) - parseInt(mouseDownPosiX) parseInt(objPosiX);
tempY = parseInt(e.pageY) - parseInt(mouseDownPosiY) parseInt(objPosiY);
obj.css({ "left": tempX "px", "top": tempY "px" });
}
//判断是否超出窗体
//计算出弹出层距离右边的位置
var dialogRight = parseInt($(window).width())-(parseInt(obj.css("left")) parseInt(obj.width()));
//计算出弹出层距离底边的位置
var dialogBottom = parseInt($(window).height())-(parseInt(obj.css("top")) parseInt(obj.height()));
var maxLeft = $(window).width()-obj.width();
var maxTop = $(window).height()-obj.height();
if(parseInt(obj.css("left"))<=0){
obj.css("left","0px");
}
if(parseInt(obj.css("top"))<=0){
obj.css("top","0px");
}
if(dialogRight<=0){
obj.css("left",maxLeft 'px');
}
}).mouseup(function () {
status = false;
}).mouseleave(function () {
status = false;
});
});
}
})
})(jQuery);
demo.html：
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1,maximum-scale=1, user-scalable=no">
<title>新建H5模板</title>
<link rel="stylesheet" href="css/dialog.css" />
<style>
input[type="button"] {
margin: 100px 20px;
padding: 10px;
}
</style>
<script type="text/javascript" src="js/jquery-1.10.1.min.js"></script>
<script type="text/javascript" src="js/dialog.js"></script>
</head>
<body>
<center>
<input type="button" value="弹出提示框" id="btnAlert" />
<input type="button" value="弹出确认框" id="btnConfirm" />
<input type="button" value="弹出iframe" id="btnDialog" />
</center>
<script type="text/javascript">
$(function() {
$("#btnAlert").click(function() {
$.DialogBySHF.Alert({
Width: 350,
Height: 200,
Title: "弹出提示框",
Content: "你好，你选择的内容是空白的",
ConfirmFun: test
});
})
$("#btnConfirm").click(function() {
$.DialogBySHF.Confirm({
Width: 350,
Height: 200,
Title: "弹出确认框",
Content: "你确定要删除这条内容吗",
ConfirmFun: test,
CancelFun: testCancel
});
})
$("#btnDialog").click(function() {
$.DialogBySHF.Dialog({
Width: 1024,
Height: 500,
Title: "新开一个窗口",
URL: "https://www.jb51.net"
});
})
})
function test() {
$.DialogBySHF.Alert({
Width: 350,
Height: 200,
Title: "确认后执行方法",
Content: "确认后执行的方法"
});
}
function testCancel() {
$.DialogBySHF.Alert({
Width: 350,
Height: 200,
Title: "取消后执行方法",
Content: "取消后执行的方法"
});
}
</script>
</body>
</html>
效果图：
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