var hoverClass = "AspNet-Menu-Hover";
var topmostClass = "AspNet-Menu";
var userAgent = navigator.userAgent;
var versionOffset = userAgent.indexOf("MSIE");
var isIE = (versionOffset >= 0);
var isPreIE7 = false;
var fullVersionIE = "";
var majorVersionIE = "";

if (isIE)
{
    fullVersionIE = parseFloat(userAgent.substring(versionOffset+5, userAgent.length));
    majorVersionIE = parseInt('' + fullVersionIE);
    isPreIE7 = majorVersionIE < 7;
}

function Hover__AspNetMenu(element)
{
    AddClass__CssFriendlyAdapters(element, hoverClass);

    if (isPreIE7)
    {
        if ((typeof(element.iFrameFormElementMask) != "undefined") && (element.iFrameFormElementMask != null))
        {
            var uls = element.getElementsByTagName("ul");
            if(uls.length > 0)
            {
                var w = uls[0].offsetWidth;
                var h = uls[0].offsetHeight;
                element.iFrameFormElementMask.style.width = w;
                element.iFrameFormElementMask.style.height = h;
                element.iFrameFormElementMask.style.top = element.offsetHeight;
                element.iFrameFormElementMask.style.left = 0;

                element.iFrameFormElementMask.style.display = "block";
            }
        }
    }
}

function Unhover__AspNetMenu(element)
{
    RemoveClass__CssFriendlyAdapters(element, hoverClass);

    if (isPreIE7)
    {
        if ((typeof(element.iFrameFormElementMask) != "undefined") && (element.iFrameFormElementMask != null))
        {
            element.iFrameFormElementMask.style.display = "none";
        }
    }
}

function SetHover__AspNetMenu()
{
    var menus = document.getElementsByTagName("ul");
    for (var i=0; i<menus.length; i++)
    {
        if(menus[i].className == topmostClass)
        {
            var items = menus[i].getElementsByTagName("li");
            for (var k=0; k<items.length; k++)
            {
                items[k].onmouseover = function() { Hover__AspNetMenu(this); }
                items[k].onmouseout = function() { Unhover__AspNetMenu(this); }

                //Add a mask if this item has a submenu
                if (isPreIE7)
                {
                    var uls = items[k].getElementsByTagName("ul");
                    if(uls.length > 0 && ((typeof(items[k].iFrameFormElementMask) == "undefined") || (items[k].iFrameFormElementMask == null)))
                    {
                        var iFrameFormElementMask = document.createElement("IFRAME");
                        iFrameFormElementMask.scrolling= "no";
                        iFrameFormElementMask.src = "javascript:false;";
                        iFrameFormElementMask.frameBorder = 0;
                        iFrameFormElementMask.style.display = "none";
                        iFrameFormElementMask.style.position = "absolute";
                        iFrameFormElementMask.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)";

                        iFrameFormElementMask.style.zIndex = -1;
                        items[k].insertBefore(iFrameFormElementMask, items[k].firstChild);
                        items[k].iFrameFormElementMask = iFrameFormElementMask;
                    }
                }
            }
        }
    }
}

if (isPreIE7)
{
    //window.onload = SetHover__AspNetMenu;
    if (window.addEventListener) {
        window.addEventListener("load", SetHover__AspNetMenu);
    }
    else if (window.attachEvent) {
        window.attachEvent("onload", SetHover__AspNetMenu);
    }
}