新东方官方网站满屏焦点图banner代码

javascript代码/* 焦点图 */$(function(){ var $root = $('#show'), root_w = $root.width(); var p = $root.find('> div.img > span'), n = p.children().length; p.children().eq(0).clone().appendTo(p); function onoff(on, off) { (on !== -1) && btns.eq(on).addClass('on'); (off !== -1) && btns.eq(off).removeClass('on'); } function dgo(n, comp) { var idx = n > max ? 0 : n; onoff(idx, cur); cur = idx; p.stop().animate({left: -1 * root_w * n}, {duration: dur, complete: comp}); if(idx == 0 ){p.children().eq(n-1).clone().appendTo('.mk1');}else{$('.mk1').empty()}; } // slast -> 如果播放完最后1张，要如何处理 // true 平滑切换到第1张 var cur = 0, max = n - 1, pt = 0, stay = 5 * 1000, /* ms */ dur = .6 * 1000, /* ms */ btns; function go(dir, slast) { pt = +new Date(); if (dir === 0) { onoff(cur, -1); p.css({left: -1 * root_w * cur}); return; } var t; if (dir > 0) { t = cur + 1; if (t > max && !slast) { t = 0; } if (t <= max) { return dgo(t); } return dgo(t, function(){ p.css({left: 0}); }); } else { t = cur - 1; if (t < 0) { t = max; p.css({left: -1 * root_w * (max + 1)}); return dgo(t); } else { return dgo(t); } } } btns = $((new Array(n + 1)).join('')) .each(function(idx, el) { $(el).data({idx: idx}); }); var pn_btn = $(''); $('