/* 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 = $('');
$('