var hoverClass = "AspNet-Menu-Hover";
var topmostClass = "AspNet-Menu clearfix";
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);
  
  var sibling = element.parentNode.firstChild;
	while (sibling)
	{
		sibling.style.position = "relative";
		sibling.style.zIndex = -1;
		sibling = sibling.nextSibling;
		if(sibling == element)
			sibling = sibling.nextSibling;
	}	

  if (isPreIE7)
  {	
    var child = element.firstChild;
    while (child)
    {
      if (child.tagName == "UL")
      {
        var grandchild = child.firstChild;
        while (grandchild)
        {
            if (grandchild.tagName == "LI")
            {
                if ((typeof(grandchild.iFrameFormElementMask) != "undefined") && (grandchild.iFrameFormElementMask != null))
                {
                    grandchild.iFrameFormElementMask.style.display = "block";

                    
                    var w = grandchild.offsetWidth;
                    if ((grandchild.offsetWidth == 0) && (typeof(element.iFrameFormElementMask) != "undefined") && (element.iFrameFormElementMask != null) && (element.iFrameFormElementMask.style.width.length > 0))
                    {
                        w = element.iFrameFormElementMask.style.width;
                    }
                    grandchild.iFrameFormElementMask.style.width = w;
                    
                    var h = grandchild.offsetHeight + 5 /* fudge to cover margins between menu items */;
                    if ((grandchild.offsetHeight == 0) && (typeof(element.iFrameFormElementMask) != "undefined") && (element.iFrameFormElementMask != null) && (element.iFrameFormElementMask.style.height.length > 0))
                    {
                        h = element.iFrameFormElementMask.style.height;
                    }
                    grandchild.iFrameFormElementMask.style.height = h;
                }
            }
            
            grandchild = grandchild.nextSibling;
        }
      }
      child = child.nextSibling;
    }
  }
}

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


	//Fix z-indexing
	var sibling = element.parentNode.firstChild;
	while (sibling)
	{
		sibling.style.position = "relative";
		sibling.style.zIndex = 350;
		sibling = sibling.nextSibling;
		if(sibling == element)
			sibling = sibling.nextSibling;
	}	

	//Fix Window (<select>) hiding
  if (isPreIE7)
  {		
    var child = element.firstChild;
    while (child)
    {
        if (child.tagName == "UL")
        {
            var grandchild = child.firstChild;
            while (grandchild)
            {
                if (grandchild.tagName == "LI")
                {
                    if ((typeof(grandchild.iFrameFormElementMask) != "undefined") && (grandchild.iFrameFormElementMask != null))
                    {
                        grandchild.iFrameFormElementMask.style.display = "none";
                    }
                }

                grandchild = grandchild.nextSibling;
            }
        }

        child = child.nextSibling;
    }
  }
}

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); }
                
                if (isPreIE7 && ((typeof(items[k].iFrameFormElementMask) == "undefined") || (items[k].iFrameFormElementMask == null)))
                {
                    var iFrameFormElementMask = document.createElement("IFRAME");
                    iFrameFormElementMask.scrolling= "no";
                    iFrameFormElementMask.src = "about:blank";
                    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 (isIE)
{
    window.onload = SetHover__AspNetMenu;
}