/*
 * 
 * ImageScroller - a Image Horizental Scroll Viewer 
 * Version 0.1
 * @requires jQuery v1.2.1
 * 
 * Copyright (c) 2007 Luan
 * Email verycss-ok@yahoo.com.cn 
 * 
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * 

*/

jQuery.fn.imageScroller = function(params){
        var p = params || {
                next:"buttonNext",
                prev:"buttonPrev",
                frame:"viewerFrame",
                width:500,
                child:"a",
                auto:true,
				direction:"turnLeft"
        }; 
        var _btnNext = $("#"+ p.next);
        var _btnPrev = $("#"+ p.prev);
        var _imgFrame = $("#"+ p.frame);
        var _width = p.width;
        var _child = p.child;
        var _auto = p.auto;
		var _direction = p.direction;
        var _itv;
		//alert(_direction);
        
        var turnLeft = function(){
                _btnPrev.unbind("click",turnLeft);
                if(_auto) autoStop();
                _imgFrame.animate( {marginLeft:-_width}, 'fast', '', function(){
                        _imgFrame.find(_child+":first").appendTo( _imgFrame );
                        _imgFrame.css("marginLeft",0);
                        _btnPrev.bind("click",turnLeft);
                        if(_auto) autoPlay();
                });
        };
        
        var turnRight = function(){
                _btnNext.unbind("click",turnRight);
                if(_auto) autoStop();
                _imgFrame.find(_child+":last").clone().show().prependTo( _imgFrame );
                _imgFrame.css("marginLeft",-_width);
                _imgFrame.animate( {marginLeft:0}, 'fast' ,'', function(){
                        _imgFrame.find(_child+":last").remove();
                        _btnNext.bind("click",turnRight);
                        if(_auto) autoPlay(); 
                });
        };
        
        _btnNext.css("cursor","hand").click( turnRight );
        _btnPrev.css("cursor","hand").click( turnLeft );
        
        var autoPlay = function(){
          _itv = window.setInterval(eval(_direction), 3000); // turnLeft , turnRight 좌우설정, 시간설정
        };
        var autoStop = function(){
                window.clearInterval(_itv);
        };
        if(_auto)       autoPlay();
};