//弹出层
function openLayer(objId,conId){
  try {
  	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.zIndex = 99;
	//创建弹出背景层
	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=40)";
	bodyBack.style.opacity = 0.4;
	bodyBack.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()
	}
	//显示背景层
	document.getElementById("bodybg").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';
  }catch(e){
  }
}
//获取内容层内容原始尺寸
function getConSize(conId){
  try {
  	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;
  }catch(e){
  }
}
function insertAfter(newElement,targetElement){//插入
	try {
		var parent = targetElement.parentNode;
		if(parent.lastChild == targetElement){
			parent.appendChild(newElement);
		}
		else{
			parent.insertBefore(newElement,targetElement.nextSibling);
		}
	}catch(e){
	}
}
//获取滚动条的高度
function getPageScroll(){
	try {
		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;
	}catch(e){
	}
}
//获取页面实际大小
function getPageSize(){
	try {
		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;
	}catch(e){
	}
}
//关闭弹出层
function closeLayer(){
	try {
		document.getElementById("popupAddr").style.display = "none";
		document.getElementById("bodybg").style.display = "none";
		return false;
	}catch(e){
	}
}

//拖拽
//对“拖动点”定义：onMousedown="StartDrag(this)" onMouseup="StopDrag(this)" onMousemove="Drag(this)"即可
var move=false,oldcolor,_X,_Y;

function StartDrag(obj){  //定义准备拖拽的函数
	try {
		obj.setCapture(); //对当前对象的鼠标动作进行跟踪
		oldcolor=obj.style.backgroundColor;
		obj.style.background="";
		move=true;
		//获取鼠标相对内容层坐标
		var parentwin=document.getElementById("popupAddr");
		_X=parentwin.offsetLeft-event.clientX;
		_Y=parentwin.offsetTop-event.clientY;
	}catch(e){
	}
}
function Drag(obj){        //定义拖拽函数
	try {
		if(move){
			var parentwin=document.getElementById("popupAddr");
			parentwin.style.left=event.clientX+_X;
			parentwin.style.top=event.clientY+_Y;
		}
	}catch(e){
	}
}
function StopDrag(obj){   //定义停止拖拽函数
	try {
		obj.style.background=oldcolor;
		obj.releaseCapture(); //停止对当前对象的鼠标跟踪
		move=false;
	}catch(e){
	}
}