_initData:false,//判断动画是否执行完毕

init: function(options) {
var t = this;
t._wapper = options.wapper;
t._grids = t._wapper.find('li');
t._gridsWidth = options.imgWidth;
t._gridsHeight = options.imgHeight;
t._spacing = options.spacing;

//取居中图片
t._middle = t._grids.length % 2 == 0 ? t._grids.length / 2 : parseInt(t._grids.length / 2);

//存放各图片参数
t._arr = {
left: [],top: [],zIndex: [],width: [],height: []
}

if ( !t._initData ) {
var interval;
interval = setInterval(function(){
$('.prevIoUs').click();
},10000);
}

t._largerImages();
t._reposition();
t._mouseEnter(t._grids) //鼠标移动上去显示主播昵称
},//初始化定位：
_largerImages: function() {
var t = this;

var front = t._middle;
var avtive = t._middle;
var last = t._grids.length;

t._grids.each( function(i,img) {

if (i == t._middle) {

 t._grids.eq(i).css({
  zIndex: 99,top: 0,left: t._spacing.left * i,height: t._gridsHeight,width: t._gridsWidth
 }); 

} else if ( i < t._middle ) {

 t._grids.eq(i).css({
  zIndex: i,top: t._spacing.top * front,height: t._gridsHeight - t._spacing.height * front,width: t._gridsWidth - t._spacing.width * front
 });

 front--;

} else {

 last --;

 t._grids.eq(last).css({
  zIndex: i,top: t._spacing.top * avtive,left: t._spacing.left * last + t._spacing.width * avtive,height: t._gridsHeight - t._spacing.height * avtive,width: t._gridsWidth - t._spacing.width * avtive
 });

 avtive --;
};

});
},//翻页动画
_reposition: function() {
var t = this;

//把各属性值传到数组里面
t._grids.each( function(i,img) {
t._arr.left.push(t._grids.eq(i).position().left);
t._arr.top.push(t._grids.eq(i).position().top);
t._arr.width.push(t._grids.eq(i).width());
t._arr.height.push(t._grids.eq(i).height());
t._arr.zIndex.push(t._grids.eq(i).css('z-index'));
});

//向前翻页
$('.prevIoUs').bind('click',function() {
if ( !t._initData && t._arr.left.length != 0) {

 t._initData = true;

 //重新<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>选择器
 var grids = t._wapper.find('li'); 

 for (var i = 1; i < grids.length ; i ++) {

  grids.eq(i).animate({
   zIndex: t._arr.zIndex[i - 1],left: t._arr.left[i - 1],top: t._arr.top[i - 1],width: t._arr.width[i - 1],height: t._arr.height[i - 1],},function() {
   t._initData = false;
   grids.find('i').addClass('cover');
   grids.eq(t._middle + 1).find('i').removeClass('cover');
  });
 };

 grids.eq(0).animate({
  left: t._arr.left[ grids.length - 1],top: t._arr.top[ grids.length - 1],width: t._arr.width[ grids.length - 1],height: t._arr.height[ grids.length - 1],zIndex: t._arr.zIndex[ grids.length - 1]
 },function(){
  $(this).appendTo(t._wapper);
 });

}

});
//向后翻页
$('.next').bind('click',function() {
if ( !t._initData && t._arr.left.length != 0) {

 t._initData = true;

 //重新<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>选择器
 var grids = t._wapper.find('li'); 

 for (var i = 0; i < grids.length - 1; i ++) {
  grids.eq(i).animate({
   left: t._arr.left[i + 1],top: t._arr.top[i + 1],width: t._arr.width[i + 1],height: t._arr.height[i + 1],zIndex: t._arr.zIndex[i + 1]
    },function() {
    t._initData = false;
   });
 };
 grids.eq(grids.length - 1).animate({
  left: t._arr.left[0],top: t._arr.top[0],width: t._arr.width[0],height: t._arr.height[0],zIndex: t._arr.zIndex[0]
 },function(){
  $(this).prependTo(t._wapper);
  grids.find('i').addClass('cover');
  grids.eq(t._middle - 1).find('i').removeClass('cover');
 });

}

});
},//鼠标进入图片效果
_mouseEnter: function(grids) {
grids.each(function(i){
$(this).mouseenter(function() {
$(this).find('.tab_name').animate({
bottom:0,opacity: 'show'
},200);
});
$(this).mouseleave(function() {
$(this).find('.tab_name').animate({
bottom:-50,opacity: 'hide'
},200);
});
});
},};

return carousel;
});