jQuery boxy插件弹出框的四个边角图片在IE中不显示问题的解决

function Boxy(element, options) {

    this.boxy = jQuery(Boxy.WRAPPER);
    jQuery.data(this.boxy[0], 'boxy', this);

    this.visible = false;
    this.options = jQuery.extend({}, Boxy.DEFAULTS, options || {});

    if (this.options.modal) {
        this.options = jQuery.extend(this.options, {center: true, draggable: false});
    }

    // options.actuator == DOM element that opened this boxy
    // association will be automatically deleted when this boxy is remove()d
    if (this.options.actuator) {
        jQuery.data(this.options.actuator, 'active.boxy', this);
    }

    this.setContent(element || "<div></div>");
    this._setupTitleBar();

    this.boxy.css('display', 'none').appendTo(document.body);
    this.toTop();

    if (this.options.fixed) {
        if (jQuery.browser.msie && jQuery.browser.version < 7) {
            this.options.fixed = false; // IE6 doesn't support fixed positioning
        } else {
            this.boxy.addClass('fixed');
        }
    }

    if (this.options.center && Boxy._u(this.options.x, this.options.y)) {
        this.center();
    } else {
        this.moveTo(
            Boxy._u(this.options.x) ? this.options.x : Boxy.DEFAULT_X,
            Boxy._u(this.options.y) ? this.options.y : Boxy.DEFAULT_Y
        );
    }

    //fengwei add 2010-11-28
    //用于解决弹出框的圆角在ie中的显示问题
    if ($.browser.msie) {
        var setFilter = function(cls) {
            var obj = $(cls), ret = obj.css("background-image").match(/url\(\"(.+)\"\)/);
            if (ret == null || ret.length < 1) return;
            obj.css({
                "background": "none", "filter": "alpha(opacity=0)",
                "filter": "progid:DXImageTransform.Microsoft.
                                             AlphaImageLoader(src='" + ret[1] + "')"
            });
        };

        setFilter(".top-left");
        setFilter(".top-right");
        setFilter(".bottom-left");
        setFilter(".bottom-right");
    }
    if (this.options.show) this.show();
};