子菜单隐藏在谷歌地图后面

在主页(pocetna(上，当你浏览"dizajn"垂直菜单时，效果很好，但当你进入"kontakt"页面时，问题出现了，菜单就在谷歌地图后面，我不知道如何解决它。如果有人知道解决方案，我会很感激。谢谢

javascript的代码是这样的(这段代码是从视频中复制的如何创建垂直菜单，因为我对编码不太了解。谢谢你的理解(

$("document").ready(function() {
    // Function triggered when mouse hovers over a menu item
    // Looking for a LI item that has a UL for a child element
    // If it does trigger the function on mouseover
    $('#sidebarmenu li a').parent().has('ul').mouseover(function() {
        // offset() returns the top & left relative position on the doc for LI
        tagOffset = $(this).offset();
        /* I use the following to get the tag name for this 
        getTagName = $(this).get(0).tagName;
        alert(getTagName); */
        // Get distance from the left for the LI
        offsetLeft = tagOffset.left;
        // Get distance from the top for the LI
        offsetTop = tagOffset.top;
        // Move the new popup 180px to the left (Width of parent UL) 
        popOutOffsetLeft = offsetLeft + 226;
        // Get the id for the first UL contained in the LI
        closeParent = $(this).closest("ul").attr("id");
        // Checking if the UL is a second level of third level popup menu
        if (closeParent == 'sidebarmenu')
        {
            // Make menu visible and move it into position on the document
            $(this).find('ul').first().css({'visibility' : 'visible', 'left' : popOutOffsetLeft + 'px', 'top' : offsetTop + 'px'});
        } else {
            // Find offset for the UL that surrounds the third level popup
            secondOffset = $(this).find('ul').last().parent().offset();
            // Subtract the top offset from the second menu to position properly
            secondOffsetTop = secondOffset.top - offsetTop;
            // Correct the positioning on offset left
            secondOffsetLeft = offsetLeft - 10;
            // Make menu visible and move it into position on the document
            $(this).find('ul').last().css({'visibility' : 'visible', 'left' : secondOffsetLeft + 'px', 'top' : secondOffsetTop + 'px'});
        }
    });
    // When the mouse moves off the menu hide everything
    $('#sidebarmenu li a').parent().has('ul').mouseout(function() {
        $(this).find('ul').css({'visibility' : 'hidden'});
    });
    });