javascript实现图片自动和可控的轮播切换特效

<script type="text/javascript">Qfast.add('widgets', { path: "http://hovertree.com/texiao/js/1/js/terminator2.2.min.js", type: "js", requires: ['fx'] });Qfast(false, 'widgets', function () {K.tabs({id: 'decoroll2', //焦点图包裹idconId: "decoimg_a2", //大图域包裹idtabId: "deconum2", //小圆点数字提示idtabTn: "a",conCn: '.decoimg_b2', //大图域配置classauto: 1, //自动播放 1或0effect: 'fade', //效果配置eType: 'mouseover', // 鼠标事件pageBt: true, //是否有按钮切换页码bns: ['.prev', '.next'], //前后按钮配置classinterval: 3000// 停顿时间})})</script>

<div id="decoroll2" class="imgfocus"><div id="decoimg_a2" class="imgbox"><div class="decoimg_b2"><a href="//www.VeVB.COm"><img src="/texiao/js/1/img/1.jpg"></a></div><div class="decoimg_b2"><a href="//www.VeVB.COm"><img src="/texiao/js/1/img/2.jpg"></a></div><div class="decoimg_b2"><a href="//www.VeVB.COm"><img src="/texiao/js/1/img/3.jpg"></a></div><div class="decoimg_b2"><a href="//www.VeVB.COm"><img src="/texiao/js/1/img/4.jpg"></a></div></div><ul id="deconum2" class="num_a2"><li><a href="javascript:void(0)" hidefocus="true" target="_self">杨幂</a></li><li><a href="javascript:void(0)" hidefocus="true" target="_self">范冰冰</a></li><li><a href="javascript:void(0)" hidefocus="true" target="_self">高圆圆</a></li><li><a href="javascript:void(0)" hidefocus="true" target="_self">刘诗诗</a></li></ul></div>