//==============================
    //下拉菜单用(jquery)
    //www.mxisky.com
    //
    //==============================
    function posXY(obj) {
        //no use
        var hk_left = obj.offsetLeft
        var hk_top = obj.offsetTop
        var vParent = obj.offsetParent;
        while (vParent.tagName.toUpperCase() != "BODY") {
            hk_left += vParent.offsetLeft;
            hk_top += vParent.offsetTop;
            vParent = vParent.offsetParent;
        }
        this.PX = hk_left;
        this.PY = hk_top;
        // alert(hk_left);
        // alert(hk_top);
    }

    var showmua = false;
    //var l;
    function showmenu(a, b) {
        //强制hide()
        for (i = 1; i <= 4; i++) {
            var el = $('#mc' + i);
            hid(el)
        }
        showmua = true;
        var e = $('#' + a);
        if (e.css("display") == "none") { e.fadeIn('normal') };
        if (b) {//默认不传入b参数
            var mc_left = document.getElementById(b).offsetLeft;
            e.css("left", mc_left);
        }
    }
    function hidemenu(a) {
        showmua = false
        setTimeout('hid("' + a + '")', 1)
        //hid(a)
    }
    function hid(a) {
        var e = $('#' + a)
        if (e.css("display") == "block" && showmua == false) { e.fadeOut('normal') }
        showmua = true;
    }