(function($) {  
$.fn.jCarouselLite = function(o) {
    o = $.extend({
        btnPrev: null,
        btnNext: null,
        btnGo: null,
        mouseWheel: false,
        auto: null,

        speed: 200,
        easing: null,

        vertical: false,
        circular: true,
        visible: 3,
        start: 0,
        scroll: 1,

        beforeStart: null,
        afterEnd: null
    }, o || {});

    return this.each(function() { 

        var running = false, animCss=o.vertical?"top":"left", sizeCss=o.vertical?"height":"width";
        var div = $(this), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible;

        if(o.circular) {
            ul.prepend(tLi.slice(tl-v-1+1).clone())
              .append(tLi.slice(0,v).clone());
            o.start += v;
        }

        var li = $("li", ul), itemLength = li.size(), curr = o.start;
        div.css("visibility", "visible");

        li.css({overflow: "hidden", float: o.vertical ? "none" : "left"});
        ul.css({margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1"});
        div.css({overflow: "hidden", position: "relative", "z-index": "2", left: "0px"});

        var liSize = o.vertical ? height(li) : width(li);  
        var ulSize = liSize * itemLength;                  
        var divSize = liSize * v;                        

        li.css({width: li.width(), height: li.height()});
        ul.css(sizeCss, ulSize+"px").css(animCss, -(curr*liSize));

        div.css(sizeCss, divSize+"px");                    

        if(o.btnPrev)
            $(o.btnPrev).click(function() {
                return go(curr-o.scroll);
            });

        if(o.btnNext)
            $(o.btnNext).click(function() {
                return go(curr+o.scroll);
            });

        if(o.btnGo)
            $.each(o.btnGo, function(i, val) {
                $(val).click(function() {
                    return go(o.circular ? o.visible+i : i);
                });
            });

        if(o.mouseWheel && div.mousewheel)
            div.mousewheel(function(e, d) {
                return d>0 ? go(curr-o.scroll) : go(curr+o.scroll);
            });

        if(o.auto)
            setInterval(function() {
                go(curr+o.scroll);
            }, o.auto+o.speed);

        function vis() {
            return li.slice(curr).slice(0,v);
        };

        function go(to) {
            if(!running) {

                if(o.beforeStart)
                    o.beforeStart.call(this, vis());

                if(o.circular) {           
                    if(to<=o.start-v-1) {          
                        ul.css(animCss, -((itemLength-(v*2))*liSize)+"px");
                        curr = to==o.start-v-1 ? itemLength-(v*2)-1 : itemLength-(v*2)-o.scroll;
                    } else if(to>=itemLength-v+1) { 
                        ul.css(animCss, -( (v) * liSize ) + "px" );
                        curr = to==itemLength-v+1 ? v+1 : v+o.scroll;
                    } else curr = to;
                } else {                   
                    if(to<0 || to>itemLength-v) return;
                    else curr = to;
                }                          

                running = true;

                ul.animate(
                    animCss == "left" ? { left: -(curr*liSize) } : { top: -(curr*liSize) } , o.speed, o.easing,
                    function() {
                        if(o.afterEnd)
                            o.afterEnd.call(this, vis());
                        running = false;
                    }
                );
                if(!o.circular) {
					
					if (div.attr("id")=="img_left_right" || div.attr("id")=="img_left_rightTwo"){
						
						$(o.btnPrev + "," + o.btnNext).empty("<span></span>");
						
						 $( (curr-o.scroll<0 && o.btnPrev)
							||
						   (curr+o.scroll > itemLength-v && o.btnNext)
							||
						   []
						 ).append("<span></span>");
						 
					}else{
						
						$(o.btnPrev + "," + o.btnNext).removeClass("disabled");
						$( (curr-o.scroll<0 && o.btnPrev)
							||
						   (curr+o.scroll > itemLength-v && o.btnNext)
							||
						   []
						 ).addClass("disabled");
					}
                }

            }
            return false;
        };
    });
};

function css(el, prop) {
    return parseInt($.css(el[0], prop)) || 0;
};
function width(el) {
    return  el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight');
};
function height(el) {
    return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom');
};

})(jQuery);

(function($){
    $.fn.zoom = function(settings){
                //一些默认配置；
                settings = $.extend({
                    height:0,
                    width:0,
                    loading:"/js/loading.gif"
                    },settings);

                var images = this;
                $(images).hide();
                var loadding = new Image();
                loadding.className="loadding"
                loadding.src = settings.loading;
                $(images).after(loadding);    
                
                //预加载
                var preLoad = function($this){
                    var img = new Image();
                    img.src = $this.src;
                    if (img.complete) { 
                        processImg.call($this);
                        return;
                    }
                    //$this.src = loadding.src;//会导致获取错误的尺寸
                    img.onload = function(){
                        //$this.src = this.src; //会导致获取错误的尺寸
                        
                        processImg.call($this);
                        img.onload=function(){};
                    } 
                }
                
                //计算图片尺寸；
                function processImg(){
                        //if(settings.height===0||settings.width ===0) return;
                        var m = this.height-settings.height;
                        var n = this.width - settings.width;
                        if(m>n)                        
                            this.height = this.height>settings.height ? settings.height : 

this.height;
                        else
                            this.width = this.width >settings.width ? settings.width : 

this.width;

                        $(this).next(".loadding").remove()
                        $(this).show();
                }
                
                return $(images).each(function(){
                    preLoad(this);
                });                
        }
})(jQuery);