// Copyright 2010 htmldrive.net Inc.
/**
* @projectHomepage http://www.htmldrive.net/welcome/amazon-scroller
* @projectDescription Amazon style image and title scroller
* @author htmldrive.net
* More script and css style : htmldrive.net
* @version 1.0
* @license http://www.apache.org/licenses/LICENSE-2.0
*/ 
(function(a){
    a.fn.img_scroller=function(p){
        var p=p||{};

        var g=p&&p.scroller_time_interval?p.scroller_time_interval:"3000";
        var h=p&&p.scroller_title_show?p.scroller_title_show:"enable";
        var i=p&&p.scroller_window_background_color?p.scroller_window_background_color:"";
        var j=p&&p.scroller_window_padding?p.scroller_window_padding:"5";
        var k=p&&p.scroller_border_size?p.scroller_border_size:"0";
        var l=p&&p.scroller_border_color?p.scroller_border_color:"";
        var m=p&&p.scroller_images_width?p.scroller_images_width:"50";
        var n=p&&p.scroller_images_height?p.scroller_images_height:"70";
        var o=p&&p.scroller_title_size?p.scroller_title_size:"12";
        var q=p&&p.scroller_title_color?p.scroller_title_color:"blue";
        var r=p&&p.scroller_show_count?p.scroller_show_count:"5";
        var d=p&&p.directory?p.directory:"images";
        j += "px";
        k += "px";
        m += "px";
        n += "px";
        o += "px";
        var dom=a(this);
        var s;
        var t=0;
        var u;
        var v;
        var w=dom.find("ul:first").children("li").length;
        var x=Math.ceil(w/r);
        if(dom.find("ul").length==0||dom.find("li").length==0){
            dom.append("Require content");
            return null
            }
            dom.find("ul:first").children("li").children("a").children("img").css("width",m).css("height",n);
        if(h=='enable'){
            dom.find("ul:first").children("li").children("a").each(function(){
                $(this).append('<br/>'+$(this).attr("title"))
                })
            }
            s_s_ul(dom,j,k,l,i);
        s_s_nav(dom.find(".img_scroller_nav"),d);
        m=parseInt(m);
        dom.find("ul:first").children("li").css("width",m+"px");
        dom.find("ul:first").children("li").children("a").css("color",q);
        dom.find("ul:first").children("li").children("a").css("font-size",o);
        begin();
        play();
        dom.find(".img_scroller_nav").children("li").hover(
            function(){
                if($(this).parent().children().index($(this))==0){
                $(this).css("background-position","left -50px");
                }else if($(this).parent().children().index($(this))==1){
                $(this).css("background-position","right -50px");
                }
            },
            function(){
                if($(this).parent().children().index($(this))==0){
                $(this).css("background-position","left top");
                }else if($(this).parent().children().index($(this))==1){
                $(this).css("background-position","right top");
                }
            }
        );
        dom.find(".img_scroller_nav").children("li").click(function(){
            if($(this).parent().children().index($(this))==0){
                previous()
                }else if($(this).parent().children().index($(this))==1){
                next()
                }
            });
    function begin(){
        var a=dom.find("ul:first").children("li").outerWidth(true)*w;
        dom.find("ul:first").children("li").hide();
        dom.find("ul:first").children("li").slice(0,r).show();
        u=dom.find("ul:first").outerWidth();
        v=dom.find("ul:first").outerHeight();
        dom.find("ul:first").width(a);
        dom.width(u+60);
        dom.height(v);
        dom.children(".img_scroller_mask").width(u);
        dom.children(".img_scroller_mask").height(v);
        dom.find("ul:first").children("li").show();
        dom.css("position","relative");
        dom.find("ul:first").css("position","absolute");
        dom.children(".img_scroller_mask").width(u);
        dom.children(".img_scroller_mask").height(v);
        dom.find(".img_scroller_nav").css('top',(v-50)/2+parseInt(j)+"px");
        dom.find(".img_scroller_nav").width(u+60)
        }
        function previous(){
        if(t==0){
            t=x-2
            }else{
            if(t==1){
                t=x-1
                }else{
                t-=2
                }
            }
        play()
    }
    function next(){
    play()
    }
    function play(){
    clearTimeout(s);
    dom.find("ul:first").animate({
        left:-(t*u)
        },500);
    t++;
    if(t>=x){
        t=0
        }
        s=setTimeout(play,g)
    }
    function s_s_ul(a,b,c,d,e){
    b=parseInt(b);
    c=parseInt(c);
    var f="border: "+d+" solid "+" "+c+"px; padding:"+b+"px; background-color:"+e;
    a.attr("style",f)
    }
    function s_s_nav(a,d){
    var b=a.children("li:first");
    var c=a.children("li:last");
    a.children("li").css("width","25px");
    a.children("li").css("height","50px");
    a.children("li").css('background-image','url("'+d+'/arrow.gif")');
    c.css('background-position','right top');
    a.children("li").css('background-repeat','no-repeat');
    c.css('right','0px');
	b.css('left','0px');
    }
}
})(jQuery);