(function($) {
    $.fn.jqueryzoom = function(options) {
        var settings = {
            xzoom: 150,
            yzoom: 100,
            offset: 10,
            position: "right",
            lens: 1,
            preload: 1
        };
        if (options) {
            $.extend(settings, options)
        }
        var noalt = '';
        $(this).hover(function() {
            var imageleft = $(this).offset().left;
            var imagetop = $(this).offset().top;
            var imagewidth = $(this).children('img').get(0).offsetwidth;
            var imageheight = $(this).children('img').get(0).offsetheight;
            noalt = $(this).children("img").attr("alt");
            var bigimage = $(this).children("img").attr("zoompic");
            $(this).children("img").attr("alt", '');
            if ($("div.zoomdiv").get().length == 0) {
                $(this).after("<div class='zoomdiv'><img class='bigimg' src='"
      + bigimage + "'/></div>");
                $(this).append("<div class='jqzoompup'>&nbsp;</div>")
            }
            if (settings.position == "right") {
                if (imageleft + imagewidth + settings.offset + settings.xzoom > screen.width) {
                    leftpos = imageleft - settings.offset - settings.xzoom
                } else {
                    leftpos = imageleft + imagewidth + settings.offset
                }
            } else {
                leftpos = imageleft - settings.xzoom - settings.offset;
                if (leftpos < 0) {
                    leftpos = imageleft + imagewidth + settings.offset
                }
            }
            $("div.zoomdiv").css({
                top: imagetop,
                left: leftpos
            });
            $("div.zoomdiv").width(300);
            $("div.zoomdiv").height(250);
            $("div.zoomdiv").show();
            if (!settings.lens) {
                $(this).css('cursor', 'crosshair')
            }
            $(document.body).mousemove(function(e) {
                mouse = new mouseevent(e);
                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.jqzoompup").width((settings.xzoom) / scalex+20);
                    $("div.jqzoompup").height((settings.yzoom) / scaley+20);
                    if (settings.lens) {
                        $("div.jqzoompup").css('visibility', 'visible')
                    }
                }
                xpos = mouse.x - $("div.jqzoompup").width() / 2 - imageleft;
                ypos = mouse.y - $("div.jqzoompup").height() / 2 - imagetop;
                if (settings.lens) {
                    xpos = (mouse.x - $("div.jqzoompup").width() / 2 < imageleft)
       ? 0
       : (mouse.x + $("div.jqzoompup").width() / 2 > imagewidth
         + imageleft) ? (imagewidth
         - $("div.jqzoompup").width() - 2) : xpos;
                    ypos = (mouse.y - $("div.jqzoompup").height() / 2 < imagetop)
       ? 0
       : (mouse.y + $("div.jqzoompup").height() / 2 > imageheight
         + imagetop) ? (imageheight
         - $("div.jqzoompup").height() - 2) : ypos
                }
                if (settings.lens) {
                    $("div.jqzoompup").css({
                        top: ypos,
                        left: xpos
                    })
                }
                scrolly = ypos;
                $("div.zoomdiv").get(0).scrolltop = scrolly * scaley;
                scrollx = xpos;
                $("div.zoomdiv").get(0).scrollleft = (scrollx) * scalex
            })
        }, function() {
            $(this).children("img").attr("alt", noalt);
            $(document.body).unbind("mousemove");
            if (settings.lens) {
                $("div.jqzoompup").remove()
            }
            $("div.zoomdiv").remove()
        });
        count = 0;
        if (settings.preload) {
            $('body').append("<div style='display:none;' class='jqpreload"
     + count + "'>loading</div>");
            $(this).each(function() {
                var imagetopreload = $(this).children("img").attr("zoompic");
                var content = jquery('div.jqpreload' + count + '').html();
                jquery('div.jqpreload' + count + '').html(content
      + '<img src=\"' + imagetopreload + '\">')
            })
        }
    }
})(jquery);
function mouseevent(e) {
    this.x = e.pagex;
    this.y = e.pagey
}