KendoUI Styled context menu

This simple context menu uses the KendoUI Stylesheet for it's look and feel.

HTML

<link rel="stylesheet" href="http://cdn.kendostatic.com/2011.3.1007/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2011.3.1007/styles/kendo.kendo.min.css">
<script src="http://cdn.kendostatic.com/2011.3.1129/js/kendo.all.min.js"></script>
<div class="iframeHeaderLinks">
    Placeholder | Save Criteria | Placeholder | Placeholder | Placeholder   
</div>
<div class="iframeContent">
    <div class="iframeInnerContentLeft">
        <div class="QueryReportSplitter">
            <div class="QueryPanel">
                <div class="contentHeader">
                    <div class="contentHeaderInnerLeft">
                        <div id="QueryTitle" class="contentHeaderTitleStatic">
                            Item Query
                        </div>
                    </div>
                    <div class="contentHeaderInnerRight">
                        <div class="QueryContextMenu"> 
                            <span id="mySpan" class="menu">Query Menu</span>
<ul id="testMenu">
    <li value=1>
        <img src="http://icons.iconarchive.com/icons/visualpharm/must-have/256/Edit-icon.png" />
        Test 1
    </li>
    <li value=2>
        <img src="http://www.iconeasy.com/icon/png/System/Sticker%20Pack%202/Text%20Edit.png" />
        Test 2
    </li>
    <li value=3>
        <img src="http://www.iconeasy.com/icon/png/System/Sticker%20Pack%202/Text%20Edit.png" />
        Test 3
    </li>
</ul>
                        </div>
                    </div>
                </div>
                <div class="innerContentBodyContainer">
                    <div class="SavedQueries"></div>
                    <div class="QueryPanelColumns"></div>
                </div>
            </div>
            <div class="ReportPanel">
                <div class="midContentHeader">
                    <div class="contentHeaderInnerLeft">
                        <div id="ReportTitle" class="contentHeaderTitleStatic">
                            Item...

CSS

.k-context-menu ul li img {
    max-height: 16px;
    max-width: 16px;
    margin: 0px 7px 0px 0px;
}

JavaScript

// This code belongs in a reusable .js file
var my = {};

my.contextMenu = function(options) {
    if (!options) {
        alert('You have not specified any options!');
        return;
    }
    if (!options.trigger) {
        alert('You must supply a trigger element selector!');
        return;
    }
    if (!options.menu) {
        alert('You must specify a menu element selector!');
        return;
    }
    if (!options.callback) {
        alert('You must specify a callback function!');
        return;
    }
    options.rightButton = options.rightButton || true;
    options.zindex = options.zindex || 999000;

    var menu = $(options.menu);
    if (!menu.parent().hasClass('k-context-menu')) menu.wrap(document.createElement('div'));
    menu = menu.parent().addClass('k-context-menu').hide();

    var panel = $('#ctxMenuPanel');
    if (!panel[0]) panel = $(document.createElement('div')).attr('id', 'ctxMenuPanel');

    menu.visible = false;
    menu.addClass('k-calendar-container k-popup k-group k-reset');
    menu.css({
        position: 'absolute',
        'background-color': 'white',
        display: 'none',
        'z-index': options.zindex + 1,
        padding: 0
    });

    menu.close = function() {
        menu.fadeOut('fast');
        panel.hide();
        menu.visible = false;
    };
    menu.show = function() {
        if (menu.visible) {
            menu.close();
        } else {
            var pos = $(this).offset();
            pos.top += 10;
            pos.left += 15;
            panel.css({
                top: 0,
                left: 0,
                width: '100%',
                height: $(document).height(),
                'background-color': 'transparent'
            }).show();
            menu.data('trigger', $(this));
            menu.css(pos).fadeIn('fast');
            menu.visible = true;
        }
        return false;
    };

    panel.css({
        position: 'absolute',
        display: 'none',
        'z-index':...