hwSlider-内容滑动切换效果（一）

[code=html]
<p id="hwslider">
	<ul>
		<li class="active"><a href="#"><img src="images/s1.jpg" alt="1"></a></li>
		<li><a href="#"><img src="images/s2.jpg" alt="2"></a></li>
		<li>Helloweba</li>
	</ul>
	<p id="dots">
		<span data-index="1" class="active"></span>
		<span data-index="2"></span>
		<span data-index="3"></span>
	</p>
	<a href="javascript:;" id="prev" class="arr"><</a>
	<a href="javascript:;" id="next" class="arr">></a>
</p>

[code=css]
#hwslider{width: 600px;height: 320px;margin:40px auto; position: relative; overflow: hidden;}
#hwslider ul{width: 600px; height: 320px; position: absolute; z-index: 1}
#hwslider ul li{display:none;position:absolute; left:0; top:0; width: 600px;height: 320px; overflow: hidden;}
#hwslider ul li.active{display: block;}
#dots{position: absolute; bottom:20px; left:270px; width: 60px; height: 12px; z-index: 2;}
#dots span{float: left; width:12px;height: 12px; border: 1px solid #fff; border-radius: 50%; background: #333; margin-right: 8px; cursor: pointer;}
#dots span.active{background: orangered}
.arr{display:none;position: absolute; top: 140px; z-index: 2;width: 40px; height: 40px; line-height: 38px; text-align: center;; font-size: 36px; background: rgba(0,0,0,.3); color: #fff; text-decoration: none}
.arr:hover{background: rgba(0,0,0,.7); text-decoration: none;}
#hwslider:hover .arr{display: block; text-decoration: none;color: #fff}
#prev{left: 20px}
#next{right: 20px}

[code=html]
<script src="http://apps.bdimg.com/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="js/hwslider.js"></script>

[code=js]
$(function(){
	var slider = $("#hwslider");
	var dots = $("#dots span"),
		prev = $("#prev"),next = $("#next");
	var sliderInder = slider.children('ul')
	var hwsliderLi = sliderInder.children('li');
	var hwsliderSize = hwsliderLi.length;  //滑块的总个数
	var index = 1; //初始显示第一个滑块
	var speed = 400; //滑动速度
	var interval = 3000; //间隔时间
	var autoPlay = false; //是否支持自动滑动
	var clickable = true; //是否已经点击了滑块在做滑动动画

});

[code=js]
	var moveTo = function(index,dir){ 
		if(clickable){
			clickable = false;

			//位移距离
			var offset = slider.width();
			if(dir == 'prev'){
				offset = -1*offset;
			}

			//当前滑块动画
			sliderInder.children('.active').stop().animate({
				left: -offset},
				speed,
				 function() {
				 	$(this).removeClass('active');
			});
			//下一个滑块动画
			hwsliderLi.eq(index-1).css('left', offset + 'px').addClass('active').stop().animate({
				left: 0}, 
				speed,
				function(){
					clickable = true;
			});

			dots.removeClass('active');
			dots.eq(index-1).addClass('active');

		}else{
			return false;
		}
	}

[code=js]
	next.on('click', function(event) {
		event.preventDefault();
		if(clickable){
			if(index >= hwsliderSize){
				index = 1;
			}else{
				index += 1;
			}
			moveTo(index,'next');
		}
	});

	prev.on('click', function(event) {
		event.preventDefault();
		if(clickable){
			if(index == 1){
				index = hwsliderSize;
			}else{
				index -= 1;
			}

			moveTo(index,'prev');
		}
		
	});

[code=js]
	dots.on('click',  function(event) {
		event.preventDefault();
		
		if(clickable){
			var dotIndex = $(this).data('index');
			if(dotIndex > index){
				dir = 'next';
			}else{
				dir = 'prev';
			}
			if(dotIndex != index){
				index = dotIndex;
				moveTo(index, dir);
			}
		}
	});

[code=js]
	if(autoPlay){
		var timer;
		var play = function(){
			index++;
			if(index > hwsliderSize){
				index = 1;
			}
			moveTo(index, 'next');
		}
		timer = setInterval(play, interval); //设置定时器

		//鼠标滑上时暂停
		slider.hover(function() {
			timer = clearInterval(timer);
		}, function() {
			timer = setInterval(play, interval);
		});
	};