// javascript document

(function($) {
    $.fn.mchange = function(options) {
        var w1, np, ns, v;
        var opts = $.extend({}, $.fn.mchange.defaults, options);
        //初始化
        var c = $(this);
        var f = c.parent();
        var n = $(opts.nav);
        var i = 0;
        var sw = 1;
        c.hide();

        if (opts.snav) {
            w1 = n.outerwidth() + (parseint(n.css("margin-left")) ? parseint(n.css("margin-left")) : 0) + (parseint(n.css("margin-right")) ? parseint(n.css("margin-right")) : 0);
            np = $(opts.nav).parent();
            n.wrapall("<div class='scroll' style='height:100%;'></div>");
            ns = np.find(".scroll");
            ns.width(n.size() * w1);
            np.stop().animate({
                scrollleft: 0
            }, 100);
        }

        function run() {
            if (sw) {
                i++;
                i = change(i);
            }
        }

        function change(idx) {
            if (c.size() > 1 || idx == "begin") {
                sw = 0;
                if (idx == "begin") {
                    idx = 0;
                    speed = 0;
                } else {
                    speed = opts.speed;
                    c.stop().fadeout(speed);
                    resets(); //重置只定义动画元素
                }

                n.removeclass("now");
                if (idx == c.size()) {
                    idx = 0;
                }
                if (idx < 0) {
                    idx = c.size() - 1;
                }

                c.eq(idx).stop().fadein(speed, function() {
                    if (typeof(opts.animates) == "function") {
                        opts.animates(idx); //执行自定义动画
                    }
                    sw = 1;
                });
                n.eq(idx).addclass("now");
                if (opts.snav) {
                    autonav(idx);
                }

                return idx;
            }
        }
        change("begin");

        if (opts.auto == 1) {
            v = setinterval(run, opts.time);
        }

        if (opts.mousestop == 1) {
            c.hover(
                function() {
                    sw = 0;
                },
                function() {
                    sw = 1;
                }
            );
        }

        //导航溢出部分滑动显示
        function autonav(idx) {
            np.animate({
                scrollleft: idx * w1
            });
        }

        n.each(function(index, element) {
            $(this).click(function() {
                if (sw == 1) {
                    change(index);
                    i = index;
                    if (opts.auto) {
                        clearinterval(v);
                        v = setinterval(run, opts.time);
                    }
                }
            });
        });

        $(opts.prev).click(function() {
            if (sw == 1) {
                if (opts.cycle == 1 || (opts.cycle == 0 && i > 0)) {
                    i--;
                    i = change(i);
                    if (opts.auto == 1) {
                        clearinterval(v);
                        v = setinterval(run, opts.time);
                    }
                }
            }
        });
        $(opts.next).click(function() {
            if (sw == 1) {
                if (opts.cycle == 1 || (opts.cycle == 0 && i < c.size() - 1)) {
                    i++;
                    i = change(i);
                    if (opts.auto) {
                        clearinterval(v);
                        v = setinterval(run, opts.time);
                    }
                }
            }
        });

        if (opts.mousewheel) {
            f.mousewheel(function(event, delta, deltax, deltay) {
                if (delta < 0) {
                    if (sw == 1) {
                        if (opts.cycle == 1 || (opts.cycle == 0 && i < c.size() - 1)) {
                            i++;
                            i = change(i);
                            if (opts.auto) {
                                clearinterval(v);
                                v = setinterval(run, opts.time);
                            }
                        }
                    }
                } else {
                    if (sw == 1) {
                        if (opts.cycle == 1 || (opts.cycle == 0 && i > 0)) {
                            i--;
                            i = change(i);
                            if (opts.auto) {
                                clearinterval(v);
                                v = setinterval(run, opts.time);
                            }
                        }
                    }
                }
                event.stoppropagation();
                event.preventdefault();
            });
        }

        function resets() {} //重置自定义动画

    };
    $.fn.mchange.defaults = {
        auto: 1, //是否自动播放,1为自动,0为手动
        arrow: 1, //是否反转箭头,1为点击左侧向右滚动,0则相反
        speed: 1000, //效果速度,大于0.3
        time: 5000, //周期时间，大于1
        nav: null, //导航
        snav: 0, //导航滚动
        prev: null, //上一个
        next: null, //下一个
        cycle: 1, //是否循环
        mousestop: 0, //是否鼠标划入停止
        mousewheel: 0, //是否开启滚轮事件
        animates: null
    }
})(jquery);
/*
$("").mchange({
	  auto  : 1,     //是否自动播放,1为自动,0为手动
	  arrow : 1,     //是否反转箭头,1为点击左侧向右滚动,0则相反
	  speed : 1000,  //效果速度,大于0.3
	  time  : 5000,  //周期时间，大于1
	  nav   : null,  //导航
      snav  : 0,  //导航滚动
	  prev  : null,  //上一个
	  next  : null,  //下一个
	  cycle : 1,     //是否循环
	  mousestop : 0,  //是否鼠标划入停止
	  mousewheel : 0,  //是否开启滚轮事件
	  animates  : null  //自定义函数
});

//自定义动画
function animate1(idx){
	$("#page1 .frame .child .block").children().attr("style","");
	switch(idx){
		case 0:
		break;
	}
}
*/