idea版本/二手物品交易与租赁系统论文/secondhand/web/common/js/jquery.jqzoom.js

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(function($) {
    $.fn.jqueryzoom = function(options) {
        var settings = {
            xzoom: 200,
            yzoom: 200,
            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("alt");
            $(this).children("img").attr("alt", '');
            if ($("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");
            $("div.zoomdiv").width(settings.xzoom);
            $("div.zoomdiv").height(settings.yzoom);
            $("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);
                    $("div.jqZoomPup").height((settings.yzoom) / scaley);
                    if (settings.lens) {
                        $("div.jqZoomPup").css('visibility', 'visible')
                    }
                }