/**
* slide (Version 1.0)
* @author lv ming (akm107@163.com)
*
* Create a Slide
* @example new Slide(container,options);
* on Jquery
*
*/
function Slide(container, options) {
    this.container = $(container);
    this.list = $(container + ' .J_slide_list');
    this.handle = $(container + ' .J_slide_trigger li');
    this.item = $(container + ' .J_slide_item');
    this.itemWH = 0;
    this.count = this.handle.length;
    this.timer = null;
    this.eTime = null;
    this.options = $.extend({
        auto: true,
        delay: 4,
        duration: 500,
        effect: 'fade',
        event: 'mouseover',
        index: 1,
        vertical: true
    }, options);
    this.init();
}
Slide.prototype = {
    init: function () {
        var slideClip, itemW, itemH, itemWH,
			that = this,
			list = this.list, item = this.item,
			op = this.options, auto = !!op.auto, vertical = !!op.vertical;
        if (op.effect === 'fade') {
            list.css({ position: 'relative' });
            item.css({ position: 'absolute' });
        }
        if (op.effect === 'slide') {
            list.css({ position: 'absolute' });
            if (!list.parent().hasClass('J_slide_clip')) {
                list.wrap('<div class="J_slide_clip"></div>');
            }
            itemW = item.outerWidth(true);
            itemH = item.outerHeight(true);
            $('.J_slide_clip').css({ position: 'relative', overflow: 'hidden', height: itemH, width: itemW });
            this.itemWH = vertical ? itemH : itemW;
        }
        this.handle.bind(op.event, this._trigger(this));
        if (op.index > this.count || op.index < 1) {
            op.index = 1;
        };
        this._show(op.index);
        if (auto) {
            this._auto();
            this.container.hover(function () { that._stop(); }, function () { that._auto(); });
        }
    },
    _trigger: function (o) {
        return function (e) {
            var index, op = o.options, handle = o.handle;
            if (op.index === (handle.index(this) + 1)) {
                return;
            }
            index = op.index = handle.index(this) + 1;
            o._show(index);
        };
    },
    _show: function (i) {
        var that = this, op = this.options, vertical = !!op.vertical;
        this.handle.removeClass('cur').eq(i - 1).addClass('cur');
        if (op.effect === 'fade') {
            clearTimeout(this.eTime);
            this.eTime = setTimeout(function () {
                that.item.not(that).css({ zIndex: 1 }).eq(i - 1).css({ zIndex: 9 }).animate({ opacity: 1 }, that.options.duration, function () {
                    that.item.not(this).css({ opacity: 0 })
                });
            }, 150);
        }
        if (op.effect === 'slide') {
            itemWH = this.itemWH;
            this.list.stop().animate({ top: -itemWH * (i - 1) }, this.options.duration);
        }
    },
    _auto: function () {
        var that = this,
			op = that.options;
        this.timer = setTimeout(function () {
            op.index = op.index < that.count ? ++op.index : 1;
            that._show(op.index);
            that._auto();
        }, op.delay * 1000);
    },
    _stop: function () {
        clearTimeout(this.timer);
    }
};