//首页列表切换
function ShowType(tdname) {
            if (document.getElementById(tdname).className == "td2") {   
                document.getElementById(tdname).className = "td1";
            }
        }
//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.border = "1px solid #ccc";
		popupDiv.style.background = "#fff";
		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 = screen.width-20;
		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";
		
	    //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';
}
//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";
	return false;
}
//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
		obj.setCapture(); //对当前对象的鼠标动作进行跟踪
		oldcolor=obj.style.backgroundColor;
		obj.style.background="#999";
		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
}
function Drag(obj){        //定义拖拽函数
	if(move){
		var parentwin=document.getElementById("popupAddr");
		parentwin.style.left=event.clientX+_X;
		parentwin.style.top=event.clientY+_Y;
	}
	}
function StopDrag(obj){   //定义停止拖拽函数
		obj.style.background=oldcolor;
		obj.releaseCapture(); //停止对当前对象的鼠标跟踪
		move=false;
		}