JQuery代码

<script type="text/javascript"> $(function() { var $banner = $('.banner'); var $banner_ul = $('.banner-img'); var $btn = $('.banner-btn'); var $btn_a = $btn.find('a') var v_width = $banner.width(); var page = 1; var timer = null; var btnClass = null; var page_count = $banner_ul.find('li').length; //把这个值赋给小圆点的个数 var banner_cir = "<li class='selected' href='#'><a></a></li>"; for (var i = 1; i < page_count; i++) { //动态添加小圆点 banner_cir += "<li><a href='#'></a></li>"; } $('.banner-circle').append(banner_cir); var cirLeft = $('.banner-circle').width() * ( - 0.5); $('.banner-circle').css({ 'marginLeft': cirLeft }); $banner_ul.width(page_count * v_width); function move(obj, classname) { //手动及自动播放 if (!$banner_ul.is(':animated')) { if (classname == 'prevBtn') { if (page == 1) { $banner_ul.animate({ left: -v_width * (page_count - 1) }); page = page_count; cirMove(); } else { $banner_ul.animate({ left: '+=' + v_width }, "slow"); page--; cirMove(); } } else { if (page == page_count) { $banner_ul.animate({ left: 0 }); page = 1; cirMove(); } else { $banner_ul.animate({ left: '-=' + v_width }, "slow"); page++; cirMove(); } } } } function cirMove() { //检测page的值，使当前的page与selected的小圆点一致 $('.banner-circle li').eq(page - 1).addClass('selected').siblings().removeClass('selected'); } $banner.mouseover(function() { $btn.css({ 'display': 'block' }); clearInterval(timer); }).mouseout(function() { $btn.css({ 'display': 'none' }); clearInterval(timer); timer = setInterval(move, 3000); }).trigger("mouseout"); //激活自动播放 $btn_a.mouseover(function() { //实现透明渐变，阻止冒泡 $(this).animate({ opacity: 0.6 }, 'fast'); $btn.css({ 'display': 'block' }); return false; }).mouseleave(function() { $(this).animate({ opacity: 0.3 }, 'fast'); $btn.css({ 'display': 'none' }); return false; }).click(function() { //手动点击清除计时器 btnClass = this.className; clearInterval(timer); timer = setInterval(move, 3000); move($(this), this.className); }); $('.banner-circle li').live('click', function() { var index = $('.banner-circle li').index(this); $banner_ul.animate({ left: -v_width * index }, 'slow'); page = index + 1; cirMove(); }); });
</script>

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HTML

<div class="banner"> <div class="banner-btn"> <a href="javascript:;" class="prevBtn"><i></i></a> <a href="javascript:;" class="nextBtn"><i></i></a> </div> <ul class="banner-img"> <li><a href="#"><img src="img/1.jpg"></a></li> <li><a href="#"><img src="img/2.jpg"></a></li> <li><a href="#"><img src="img/3.jpg"></a></li> <li><a href="#"><img src="img/4.jpg"></a></li> <li><a href="#"><img src="img/5.jpg"></a></li> <li><a href="#"><img src="img/6.jpg"></a></li> </ul> <ul class="banner-circle"></ul>
</div>

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