網頁彈出層的JS代碼_層和布局特效

一款在網頁中彈出層的實例代碼，基于JS+css，本實例包含兩個實例，一個是標準彈出層，另一個是彈出一個可拖動的層，并可設置層的標題，容器內容等，這是一個基本的層彈出單元，所有復雜的層彈出代碼都可在此基礎上進一步擴展。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" mrc="text/html; charset=gb2312" />
<title>一個簡單的網頁彈出層</title>
<style>
* {margin:0;}
body {font-size:9pt;}
#container div{margin-top:6px;}
#select_city h3{float:left;}
#main_city,#all_province {clear:both;}
#main_city div,#all_province div{width:588px;clear:left;}
#main_city h4,#all_province h4{float:left;display:inline;font-size:16px;}
#main_city div span,#all_province div span{margin:0 9px;cursor:pointer;font-size:14px;}
#float_lay{width:220px;height:122px;border:1px #787878 solid;position:absolute;background:#fff;z-index:999;display:none;}
</style>
<script type="text/javascript">
//彈出層
function openLayer(objId,conId){
var arrayPageSize   = getPageSize();//調用getPageSize()函數
var arrayPageScroll = getPageScroll();//調用getPageScroll()函數
if (!document.getElementById("popupAddr")){
//創建彈出內容層
var popupDiv = document.createElement("div");
//給這個元素設置屬性與樣式
popupDiv.setAttribute("id","popupAddr")
popupDiv.style.position = "absolute";
popupDiv.style.border = "1px solid #ccc";
popupDiv.style.background = "#fff";
popupDiv.style.zIndex = 99;
//創建彈出背景層
var bodyBack = document.createElement("div");
bodyBack.setAttribute("id","bodybg")
bodyBack.style.position = "absolute";
bodyBack.style.width = "100%";
bodyBack.style.height = (arrayPageSize[1] + 35 + 'px');
bodyBack.style.zIndex = 98;
bodyBack.style.top = 0;
bodyBack.style.left = 0;
bodyBack.style.filter = "alpha(opacity=50)";
bodyBack.style.opacity = 0.5;
bodyBack.style.background = "#ddf";
//實現彈出(插入到目標元素之后)
var mybody = document.getElementById(objId);
insertAfter(popupDiv,mybody);//執行函數insertAfter()
insertAfter(bodyBack,mybody);//執行函數insertAfter()
}
//顯示背景層
document.getElementById("bodybg").style.display = "";
//顯示內容層
var popObj=document.getElementById("popupAddr")
popObj.innerHTML = document.getElementById(conId).innerHTML;
popObj.style.display = "";
//讓彈出層在頁面中垂直左右居中(統一)
// popObj.style.width  = "600px";
// popObj.style.height = "400px";
// popObj.style.top  = arrayPageScroll[1] + (arrayPageSize[3] - 35 - 400) / 2 + 'px';
// popObj.style.left = (arrayPageSize[0] - 20 - 600) / 2 + 'px';
//讓彈出層在頁面中垂直左右居中(個性)
var arrayConSize=getConSize(conId)
popObj.style.top  = arrayPageScroll[1] + (arrayPageSize[3] - arrayConSize[1]) / 2-50 + 'px';
popObj.style.left = (arrayPageSize[0] - arrayConSize[0]) / 2 -30 + 'px';
}
//獲取內容層內容原始尺寸
function getConSize(conId){
var conObj=document.getElementById(conId)
conObj.style.position = "absolute";
conObj.style.left=-1000+"px";
conObj.style.display="";
var arrayConSize=[conObj.offsetWidth,conObj.offsetHeight]
conObj.style.display="none";
return arrayConSize;
}
function insertAfter(newElement,targetElement){//插入
var parent = targetElement.parentNode;
if(parent.lastChild == targetElement){
parent.appendChild(newElement);
}
else{
parent.insertBefore(newElement,targetElement.nextSibling);
}
}
//獲取滾動條的高度
function getPageScroll(){
var yScroll;
if (self.pageYOffset) {
yScroll = self.pageYOffset;
} else if (document.documentElement  &&  document.documentElement.scrollTop){
yScroll = document.documentElement.scrollTop;
} else if (document.body) {
yScroll = document.body.scrollTop;
}
arrayPageScroll = new Array('',yScroll)
return arrayPageScroll;
}
//獲取頁面實際大小
function getPageSize(){
var xScroll,yScroll;
if (window.innerHeight  &&  window.scrollMaxY){
xScroll = document.body.scrollWidth;
yScroll = window.innerHeight + window.scrollMaxY;
} else if (document.body.scrollHeight > document.body.offsetHeight){
sScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else {
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth,windowHeight;
//var pageHeight,pageWidth;
if (self.innerHeight) {
windowWidth = self.innerWidth;
windowHeight = self.innerHeight;
} else if (document.documentElement  &&  document.documentElement.clientHeight) {
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
} else if (document.body) {
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}
var pageWidth,pageHeight
if(yScroll < windowHeight){
pageHeight = windowHeight;
} else {
pageHeight = yScroll;
}
if(xScroll < windowWidth) {
pageWidth = windowWidth;
} else {
pageWidth = xScroll;
}
arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
return arrayPageSize;
}
//關閉彈出層
function closeLayer(){
document.getElementById("popupAddr").style.display = "none";
document.getElementById("bodybg").style.display = "none";
return false;
}
</script>
<script type="text/javascript">
// http://www.ghpqjb.com
//對“拖動點”定義：onMousedown="StartDrag(this)" onMouseup="StopDrag(this)" onMousemove="Drag(this)"即可
var move=false,oldcolor,_X,_Y;
function StartDrag(obj){  //定義準備拖拽的函數
obj.setCapture(); //對當前對象的鼠標動作進行跟蹤
oldcolor=obj.style.backgroundColor;
obj.style.background="#999";
move=true;
//獲取鼠標相對內容層坐標
var parentwin=document.getElementById("popupAddr");
_X=parentwin.offsetLeft-event.clientX
_Y=parentwin.offsetTop-event.clientY
}
function Drag(obj){        //定義拖拽函數
if(move){
var parentwin=document.getElementById("popupAddr");
parentwin.style.left=event.clientX+_X;
parentwin.style.top=event.clientY+_Y;
}
}
function StopDrag(obj){   //定義停止拖拽函數
obj.style.background=oldcolor;
obj.releaseCapture(); //停止對當前對象的鼠標跟蹤
move=false;
}
</script>
</head>
<body>
<input name="Input"  id="test" value="點擊彈出層" type="button" onclick="openLayer('test','test_con')" />
<div id="test_con" style="display:none">
<div id="tab" style="padding:8px;">
<div id="tabtop">
<div id="tabtop-L"><strong>層的標題在這里</strong></div>
<div id="tabtop-R" onclick="closeLayer()"><strong>[關閉層]</strong></div>
</div>
<div id="tabmrc">模板無憂（mb5u.com）提供各類編程源碼、視頻教程下載。</div>
</div>
</div>
<br>
<br>
<input name="Input"  id="test3" value="可拖動層" type="button" onclick="openLayer('test3','test_con3')" />
<div id="test_con3" style="display:none">
<div id="tab3" style="width:360px;height:200px;background:#fee;">
<div id="tabtop3">
<div id="tabtop-L3" onMousedown="StartDrag(this)" onMouseup="StopDrag(this)" onMousemove="Drag(this)"><strong style="color:red;font-size:20px">可拖動層的標題</strong></div>
<div id="tabtop-R3" onclick="closeLayer()"><strong>[關閉層]</strong></div>
</div>
<div id="tabmrc3" style="padding:8px">歡迎來到模板無憂</div>
</div>
</div>
</body>
</html>

所屬頻道：層和布局特效/更新時間：2013-01-08

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