//弹出层
function openLayer(objId,conId){
var arrayPageSize = getPageSize();//调用getPageSize()函数
var arrayPageScroll = getPageScroll();//调用getPageScroll()函数
if (!document.getElementById("popupAddr")){

//创建弹出内容层
var popupDiv = document.createElement("div");

//给这个元素设置属性与样式
popupDiv.setAttribute("id","popupAddr")
popupDiv.style.position = "absolute";
popupDiv.style.background = "#fff";
popupDiv.style.zIndex = 5000;

//创建弹出背景层
var bodyBack = document.createElement("div");
bodyBack.setAttribute("id","bodybg")
bodyBack.style.position = "absolute";
bodyBack.style.width = "100%";
if(window.ie6){
bodyBack.style.width = (arrayPageSize[2] + 'px');
}
bodyBack.style.height = (arrayPageSize[1] + 'px');
bodyBack.style.zIndex = 4999;
bodyBack.style.top = 0;
bodyBack.style.left = 0;

bodyBack.style.filter = "alpha(opacity=40)";
bodyBack.style.opacity = 0.4;
bodyBack.style.background = "#000";

//创建弹出IFrame 修补ie6 bug
if(window.ie6){
var bodyIframe = document.createElement("iframe");
bodyIframe.setAttribute("id","bodyiframe")
bodyIframe.style.position = "absolute";
bodyIframe.style.width = (arrayPageSize[2] + 'px');
bodyIframe.style.height = (arrayPageSize[1] + 'px');
bodyIframe.style.zIndex = 4998;
bodyIframe.style.top = 0;
bodyIframe.style.left = 0;

bodyIframe.style.filter = "alpha(opacity=10)";
bodyIframe.style.opacity = 0.1;
bodyIframe.style.background = "#000";
}

//实现弹出(插入到目标元素之后)
var mybody = document.getElementById(objId);
insertAfter(popupDiv,mybody);//执行函数insertAfter()
insertAfter(bodyBack,mybody);//执行函数insertAfter()
if(window.ie6){
insertAfter(bodyIframe,mybody);//执行函数insertAfter()
}
}

//显示背景层
document.getElementById("bodybg").style.display = "";
if(window.ie6){
document.getElementById("bodyiframe").style.display = "";
}
//显示内容层
var popObj=document.getElementById("popupAddr")
popObj.innerHTML = document.getElementById(conId).innerHTML;
popObj.style.display = "";
//让弹出层在页面中垂直左右居中(统一)
//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';
//让弹出层在页面中垂直左右居中(个性)
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';
popObj.style.top = arrayPageScroll[1] + (arrayPageSize[3] - arrayConSize[1]) / 2 + 'px';
popObj.style.left = (arrayPageSize[0] - arrayConSize[0]) / 2 + 'px';
}
//获取内容层内容原始尺寸
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);
}
}
//获取滚动条的高度
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;
}
//获取页面实际大小
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;
}
//关闭弹出层
function closeLayer(){
document.getElementById("popupAddr").style.display = "none";
document.getElementById("bodybg").style.display = "none";
if(window.ie6){
document.getElementById("bodyiframe").style.display = "none";
}
return false;
}