(function($) {
    $.fn.imagezoom = function(options) {
        var settings = {
            xzoom: 310,
            yzoom: 310,
            offset: 10,
            position: "btr",
            preload: 1,
			windowminwidth: 1,
			mouseenter: function(){},
			mouseleave: function(){}
        };
        if (options) {
            $.extend(settings, options);
        }
        var noalt = '';
        var self = this;
        $(this).bind("mouseenter",
        function(ev) {
			if($(window).width() < settings.windowminwidth) return;
            var imageleft = $(this).offset().left;
            var imagetop = $(this).offset().top;
            var imagewidth = $(this).get(0).offsetwidth;
            var imageheight = $(this).get(0).offsetheight;
            var boxleft = $(this).parent().offset().left;
            var boxtop = $(this).parent().offset().top;
            var boxwidth = $(this).parent().width();
            var boxheight = $(this).parent().height();
            noalt = $(this).attr("alt");
            var bigimage = $(this).attr("rel");
            if(!bigimage) bigimage = $(this).attr("url");
            if(!bigimage) bigimage = $(this).attr("src");
            $(this).attr("alt", '');
            if ($("div.zoomdiv").get().length == 0) {
                $(document.body).append("<div class='zoomdiv' style='z-index:999;position:absolute;top:0px;left:0px;width:400px;height:400px;background:#ffffff;border:1px solid #cccccc;display:none;text-align:center;overflow:hidden;'><img class='bigimg' style='max-width:3000px;max-height:3000px;' src='" + bigimage + "'/></div><div class='zoommask' style='position:absolute;background:url(/images/mask.png) repeat scroll 0 0 transparent;cursor:move;z-index:1;width:100px;height:100px;'>&nbsp;</div>");
            }
            if (settings.position == "btr") {
                if (boxleft + boxwidth + settings.offset + settings.xzoom > screen.width) {
                    leftpos = boxleft - settings.offset - settings.xzoom;
                } else {
                    leftpos = boxleft + boxwidth + settings.offset;
                }
            } else {
                leftpos = imageleft - settings.xzoom - settings.offset;
                if (leftpos < 0) {
                    leftpos = imageleft + imagewidth + settings.offset;
                }
            }
            $("div.zoomdiv").css({
                top: boxtop,
                left: leftpos
            });
            $("div.zoomdiv").width(settings.xzoom);
            $("div.zoomdiv").height(settings.yzoom);
            $("div.zoomdiv").show();
            $(this).css('cursor', 'crosshair');
            $(document.body).bind('mousemove.imagezoom',function(e) {
                mouse = new mouseevent(e);
                if (mouse.x < imageleft || mouse.x > imageleft + imagewidth || mouse.y < imagetop || mouse.y > imagetop + imageheight) {
                    mouseoutimage();
                    return;
                }
                var bigwidth = $(".bigimg").get(0).offsetwidth;
                var bigheight = $(".bigimg").get(0).offsetheight;
                var scaley = 'x';
                var scalex = 'y';
                if (isnan(scalex) | isnan(scaley)) {
                    var scalex = (bigwidth / imagewidth);
                    var scaley = (bigheight / imageheight);
                    $("div.zoommask").width((settings.xzoom) / scalex);
                    $("div.zoommask").height((settings.yzoom) / scaley);
                    $("div.zoommask").css('visibility', 'visible');
                }
                xpos = mouse.x - $("div.zoommask").width() / 2;
                ypos = mouse.y - $("div.zoommask").height() / 2;
                xposs = mouse.x - $("div.zoommask").width() / 2 - imageleft;
                yposs = mouse.y - $("div.zoommask").height() / 2 - imagetop;
                xpos = (mouse.x - $("div.zoommask").width() / 2 < imageleft) ? imageleft: (mouse.x + $("div.zoommask").width() / 2 > imagewidth + imageleft) ? (imagewidth + imageleft - $("div.zoommask").width()) : xpos;
                ypos = (mouse.y - $("div.zoommask").height() / 2 < imagetop) ? imagetop: (mouse.y + $("div.zoommask").height() / 2 > imageheight + imagetop) ? (imageheight + imagetop - $("div.zoommask").height()) : ypos;
                $("div.zoommask").css({
                    top: ypos,
                    left: xpos
                });
                $("div.zoomdiv").get(0).scrollleft = xposs * scalex;
                $("div.zoomdiv").get(0).scrolltop = yposs * scaley;
            });
			settings.mouseenter($(self));
        });
        function mouseoutimage() {
			//if($(window).width() < settings.windowminwidth) return;
            $(self).attr("alt", noalt);
            $(document.body).unbind("mousemove.imagezoom");
            $("div.zoommask").remove();
            $("div.zoomdiv").remove();
			settings.mouseleave($(self));
        }
        count = 0;
        if (settings.preload) {
            $('body').append("<div style='display:none;' class='jqpreload" + count + "'></div>");
            $(this).each(function() {
                var imagetopreload = $(this).attr("rel");
                var content = jquery('div.jqpreload' + count + '').html();
                if(imagetopreload) jquery('div.jqpreload' + count + '').html(content + '<img src=\"' + imagetopreload + '\">');
            });
        }
    }
})(jquery);
function mouseevent(e) {
    this.x = e.pagex;
    this.y = e.pagey;
}