轮播图适应代码jQ

(function(){
		var i = 0;
		var time ;
		$('.page-size').html('1');
		var obj = $('.xst-scroll>li');
		var imgChange  =  function(){
			$('.page-size').html(i+1);
			obj.animate({
				opacity: '0'},
				100, function() {
				obj.css({
					display: 'none'
				});
				obj.eq(i).css({
					display: 'block'
				});
				obj.eq(i).animate({
					opacity: '1'},
					100);
			});
		}
		var imgAuto = function(){
			i++;
			if(i>=obj.length){
				i=0;
			};
			imgChange();
		}
		var imgLeft = function(){
			clearInterval(time);
			i--;
			if(i<0){
				i=obj.length-1;
			}
			imgChange();
			time = setInterval(imgAuto, 5000);
		}
		var imgRight = function(){
			clearInterval(time);
			i++;
			if(i>=obj.length){
				i=0;
			};
			imgChange();
			time = setInterval(imgAuto, 5000);
		}
		$('.page-sum').html(obj.length);
		time = setInterval(imgAuto, 5000);
		$('.previous').click(function(event) {
			imgLeft();
		});
		$('.next').click(function(event) {
			imgRight();
		});
	})();
	//轮播图代码

　　使用说明：.page-size显示当前页码（第几张图），.page-sum显示总共页码（共几张图）；.previous上一张，.next下一张，.xst-scroll>li存放图片，