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：
rush: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,.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,.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(0,0.1);
*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(0,0.1);
color: #333333;
}
#DialogBySHF #Container table #BtnLine input:focus
{
border: 1px solid #4D90FE;
outline: medium none;
}
dialog.js：
rush: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("
");
Content.push("
araMS.Width + "px;height:" + ParaMS.Height + "px;left:" + positionLeft + "px;top:" + positionTop + "px;\">");
Content.push("
" + ParaMS.Title + "
");
Content.push(" ");
}
else {
var TipLineHeight = ContentHeight - 60;
Content.push(" araMS.Content + "");
if (caller == "Confirm") {
Content.push(" ");
}
Content.push(" ");
Content.push("
");
$("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：