/**
 * 用于首页的明星产品滚动功能
 * 作者: 晏海水　日期:2010-10-01
 */

<!--
$(document).ready(function () {
	$(".son_ul").hide(); //初始son_ul隐藏
	$(".select_box span").hover(function () { //鼠标移动函数
		$(this).parent().find(".son_ul").slideDown();  //找到son_ul显示
		$(this).parent().find(".son_ul").hover(function () {
			$(this).parent().find("span").addClass("hover");
		}, function () {
			$(this).parent().find("span").removeClass("hover");
		});
		$(this).parent().find("span").hover(function () {
			$(this).addClass("hover");
		}, function () {
			$(this).removeClass("hover");
		}); //li的hover效果
		$(this).parent().hover(function () {
		}, function () {
			$(this).parent().find(".son_ul").slideUp();
		});
	}, function () {
	});
}); 


//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 = "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";
	//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;
}
//-->