// JavaScript Document
function imgFocus(container,time){
	var THIS=this;
	this.index = 1;
	this.imgSize = $(container+" .focusPic img").size();
	//初始化函数
	this.init = function(){
		//复制图片到略缩图
		$(container+" .focusPic a img").clone().appendTo(container+" .focusPreview");
		//加载数字按钮
		$(container+" .focusBtns").empty()
		for(i=this.imgSize,j=0;i>0;i--,j++){
			$(container+" .focusBtns").append("<a>"+i+"</a>");
		}
		//设置焦点图层的顺序
		$(container+" .focusPic a").eq(0).css("z-index",this.imgSize).css("position","absolute");
		$(container+" .focusPic a").not($(container+" .focusPic a")[0]).css("z-index",1);
		this.setStatus(1);
		this.bindEvent();
	}
	//绑定动作函数
	this.bindEvent = function(){
		//略缩图绑定动作
		$(container+" .focusPreview img").hover(function(){
			$(this).addClass("active");
		},function(){
			$(this).removeClass("active");
			$(container+" .focusPreview img").eq(THIS.index-1).addClass("active");
		});
		$(container+" .focusPreview img").each(function(i){
			$(this).click(function(){
				THIS.imgActive(i+1);
			});
		});
		//绑定数字按钮动作
		$(container+" .focusBtns a").hover(function(){
			$(this).addClass("active");
		},function(){
			$(this).removeClass("active");
			$(container+" .focusBtns a").eq(THIS.imgSize - THIS.index).addClass("active");
		});
		$(container+" .focusBtns a").each(function(i){
			$(this).click(function(){
				THIS.imgActive(THIS.imgSize-i);
			});
		});
	}
	//设置状态函数
	this.setStatus = function(i){
		$(container+" .focusPreview img").removeClass("active").eq(i-1).addClass("active");
		$(container+" .focusBtns a").removeClass("active").eq(this.imgSize-i).addClass("active");
		$(container+" .focusTitles a").hide().eq(i-1).show();
	}
	//焦点图激活
	this.imgActive = function(i){
		if(THIS.index != i){
			var tempIndex = THIS.index;
			$(container+" .focusPic a").eq(i-1).css("z-index",THIS.imgSize-1);
			this.setStatus(i);
			THIS.index = i;
			$(container+" .focusPic a").eq(tempIndex-1).fadeOut(500,function(){
				$(container+" .focusPic a").eq(i-1).css("z-index",THIS.imgSize);
				$(container+" .focusPic a").not($(container+" .focusPic a")[THIS.index-1]).css("z-index",0).show();
			});
		}
	}
	//递增轮换
	this.next = function(){
		var tempIndex = THIS.index;
		if(tempIndex>=THIS.imgSize){
			tempIndex = 1;
		}else{
			tempIndex++;
		}
		THIS.imgActive(tempIndex);
		setTimeout(THIS.next,time);
	}
	//启动函数
	this.play = function(){
		this.init();
		setTimeout(this.next,time);
	}
}