(function($) {
    $.fn.extend({
    Scroll: function(opt, callback) {
        
        var sc = new RunScroll({ 
        
        name: this.attr('id'),
            line: opt.line, 
            column: opt.column, speed: opt.speed, timer: opt.timer, action:opt.action });
            sc.Run();
        }
    })
})(jQuery);

var __ScrollTimeID={};

function RunScroll(pJso)
{
    _.init(this,pJso,{
			line:1,
			column:1,
			speed:800,
			timer:5000,
			name:'',
			action:'Top'
		});
	
	if(!this.name)
	{
		alert('Unspecified tagID [name].')
	}
	this.jq=$('#'+this.name);
}

RunScroll.prototype =
{
    Run: function() {

        var _this = this.jq.eq(0); //.find("ul:first");
        var lineH;
        var line;

        if (this.action == 'Top' || this.action == 'Bottom') {
            lineH = _this.find("li:first").height(); //获取行高
            line = this.line ? parseInt(this.line, 10) : parseInt(this.jq.height() / lineH, 10);
        } else {
            lineH = _this.find("li:first").width(); //获取行高
            line = this.line ? parseInt(this.line, 10) : parseInt(this.jq.width() / lineH, 10);
        }

        var speed = this.speed ? parseInt(this.speed, 10) : 500; //卷动速度，数值越大，速度越慢（毫秒）
        var timer = this.timer ? parseInt(this.timer, 10) : 3000; //滚动的时间间隔（毫秒）
        var lineColumn = this.column ? parseInt(this.column, 10) : 1; //每行显示几列

        if (line == 0) line = 1;
        var upHeight = -line * lineH / lineColumn;

        var animateAction;
        var animateAction1;
        switch (this.action) {
            case 'Top':
                animateAction = { marginTop: upHeight };
                animateAction1 = { marginTop: 0 };
                break;

            case 'Bottom':
                animateAction = { marginBottom: upHeight };
                animateAction1 = { marginBottom: 0 };
                break;

            case 'Left':
                animateAction = { marginLeft: upHeight };
                animateAction1 = { marginLeft: 0 };
                break;

            case 'Right':
                animateAction = { marginRight: upHeight };
                animateAction1 = { marginRight: 0 };
                break;
        }

        var scrollUp = function() {

            _this.animate(animateAction, speed, function() {
                for (i = 1; i <= line; i++) {
                    _this.find("li:first").appendTo(_this);
                }
                _this.css(animateAction1);
            });
        }

        //鼠标事件绑定
        _this.hover(function() {
            clearInterval(this.timeID);
        }, function() {
            this.timeID = setInterval(scrollUp, timer);
        }).mouseout();

    }
}

//run
$(function () {
    var o = $('*[fname=Scrool]');
    if (o.length == 0) {
        return;
    }
    o = o[0];
    eval('var fjson=' + $(o).attr('fdata'));
    $(o).Scroll(fjson);
});