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(function () {
function g(s) {
return document.getelementbyid(s);
}
function getstyle(obj, attr) {
if (obj.currentstyle) {
return obj.currentstyle[attr];
} else {
return getcomputedstyle(obj, false)[attr];
}
}
function animate(obj, json) {
if (obj.timer) {
clearinterval(obj.timer);
}
obj.timer = setinterval(function () {
for (var attr in json) {
var icur = parseint(getstyle(obj, attr));
icur = icur ? icur : 0;
var ispeed = (json[attr] - icur) / 5;
ispeed = ispeed > 0 ? math.ceil(ispeed) : math.floor(ispeed);
obj.style[attr] = icur ispeed 'px';
if (icur == json[attr]) {
clearinterval(obj.timer);
}
}
}, 30);
}
var opic = g("picbox");
var olist = g("listbox");
var oprev = g("prev");
var onext = g("next");
var oprevtop = g("prevtop");
var onexttop = g("nexttop");
var opicli = opic.getelementsbytagname("li");
var olistli = olist.getelementsbytagname("li");
var len1 = opicli.length;
var len2 = olistli.length;
var opicul = opic.getelementsbytagname("ul")[0];
var olistul = olist.getelementsbytagname("ul")[0];
var w1 = opicli[0].offsetwidth;
var w2 = olistli[0].offsetwidth;
opicul.style.width = w1 * len1 "px";
olistul.style.width = w2 * len2 "px";
var index = 0;
var num = 5;
var num2 = math.ceil(num / 2);
function change() {
animate(opicul, { left: -index * w1 });
if (index < num2) {
animate(olistul, { left: 0 });
} else if (index num2 <= len2) {
animate(olistul, { left: -(index - num2 1) * w2 });
} else {
animate(olistul, { left: -(len2 - num) * w2 });
}
for (var i = 0; i < len2; i ) {
olistli[i].classname = "";
if (i == index) {
olistli[i].classname = "on";
}
}
}
onexttop.onclick = onext.onclick = function () {
index ;
index = index == len2 ? 0 : index;
change();
}
oprev.onmouseover = onext.onmouseover = oprevtop.onmouseover = onexttop.onmouseover = function () {
clearinterval(timer);
}
oprev.onmouseout = onext.onmouseout = oprevtop.onmouseout = onexttop.onmouseout = function () {
timer = setinterval(autoplay, 4000);
}
oprevtop.onclick = oprev.onclick = function () {
index--;
index = index == -1 ? len2 - 1 : index;
change();
}
var timer = null;
timer = setinterval(autoplay, 4000);
function autoplay() {
index ;
index = index == len2 ? 0 : index;
change();
}
for (var i = 0; i < len2; i ) {
olistli[i].index = i;
olistli[i].onclick = function () {
index = this.index;
change();
}
}
})()
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