// Css menu support functions only required for drop down menus
function expand(Owner, SubMenu)
{
    var td = SubMenu;
    var d = td.getElementsByTagName("div").item(0);

    Owner.className = "menuHover";
    d.className = "menuHover";
}

function collapse(Owner, SubMenu)
{
    var td = SubMenu;
    var d = td.getElementsByTagName("div").item(0);

    Owner.className = "menuNormal";
    d.className = "menuNormal";
}


// Css menu support functions only required for pull right side sub menus
function sub_expand(Owner, SubMenu)
{
    var td = SubMenu;
    var d = td.getElementsByTagName("div").item(0);

    Owner.className = "submenuHover"
    d.className = "submenuHover"
}

function sub_collapse(Owner, SubMenu)
{
    var td = SubMenu;
    var d = td.getElementsByTagName("div").item(0);

    Owner.className = "submenuNormal";
    d.className = "submenuNormal";
}


// Newsscroller funtion from here on

function NewsScroller ()
{
    if (window.NewsScrollerInstance != null)
    {
        window.alert("Only one NewsScroller control is allowed on a page.");
        return;
    }
    window.NewsScrollerInstance = this;
    
    this.LoadXML = NewsScroller_LoadXML;
    this.AddNewsItem = NewsScroller_AddNewsItem;
    this.Clear = NewsScroller_Clear;
    this.StartScrolling = NewsScroller_StartScrolling;
    this.StopScrolling = NewsScroller_StopScrolling;
    this.Render = NewsScroller_Render;
    
    // public properties
    this.className = "";
    this.itemNormalClassName = "";

    this.scrollRate = 25;
    this.scrollStep = 1;
    this.scrollPause = 2000;
    
    // internal use
    this.RenderChildren = NewsScroller_RenderChildren;

    this.renderedControl = "";
    this.itemsText = new Array();
    this.itemsLink = new Array();
    this.itemCount = 0;
    
    this.scrollEnabled = false;
}

function NewsScroller_LoadXML (sXmlID)
{
    this.Clear();
    var elmXml = document.getElementById(sXmlID);
    var xDoc = elmXml.XMLDocument;
    var xItems = xDoc.selectNodes("/Items/Item");
    for (var iNode = 0; iNode < xItems.length; iNode++)
    {
        var xItem = xItems[iNode];
        var xText = xItem.selectSingleNode("Text");
        var xLink = xItem.selectSingleNode("Link");
        this.AddNewsItem(xText.text, xLink.text);
    }
    var elmControl = document.getElementById(this.renderedControl);
    this.RenderChildren(this.renderedControl);
}

function NewsScroller_AddNewsItem (strText, strLink)
{
    this.itemsText[this.itemCount] = strText;
    this.itemsLink[this.itemCount] = strLink;
    this.itemCount++;
}

function NewsScroller_Clear ()
{
    this.StopScrolling ();
    var elmControl = document.getElementById(this.renderedControl);
    while (elmControl.childNodes.length > 0)
        elmControl.removeChild(elmControl.childNodes[0]);
    this.itemsText = new Array();
    this.itemsLink = new Array();
    this.itemCount = 0;
}

function NewsScroller_StartScrolling ()
{
    if (this.itemCount > 0)
    {
        var sControlName = this.renderedControl;
        if (sControlName == null)
        {
            window.alert ("You must render a control before you can start scrolling it.");
            return;
        }
        var elmControl = document.getElementById(sControlName);
        var elmItem0 = document.getElementById("floatingNews0");
        if (this.itemCount > 1)
        {
            var elmItem1 = document.getElementById(sControlName + "1");
            this.cySeparator = (elmItem1.offsetTop - elmItem0.offsetTop) - elmItem0.offsetHeight;
        }
        else
        {
            this.cySeparator = 0;
        }
       
        if (this.ScrollTimerID == null)
            this.ScrollTimerID = window.setInterval(NewsScroller_ScrollNews, this.scrollRate);
    }
}

function NewsScroller_StopScrolling ()
{
    window.clearInterval(this.ScrollTimerID);
    this.ScrollTimerID = null;
}

function NewsScroller_Render(sControlID)
{
    if (sControlID.length == 0)
    {
        window.alert("You must provide a unique ID for the rendered control.");
        return;
    }
    var elmControl = document.getElementById(sControlID);
    if (elmControl != null)
    {
        window.alert("A NewsScroller with this ID has already been rendered. Please use a unique ID.");
        return;
    }
    this.renderedControl = sControlID;
    
    // <DIV>
    document.write("<div");
    document.write(" id=\"" + sControlID + "\"");
    document.write(" class=\"" + this.className + "\"");
    document.write(" style=\"position: relative; width: 100%; height: 100%; \"");
    document.write(">");
    
    // </DIV>
    document.write("</div>");

    this.RenderChildren(sControlID);
 
    var dtNow = new Date();
    var dtResume = new Date(dtNow.getFullYear(), dtNow.getMonth(), dtNow.getDate(), dtNow.getHours(), dtNow.getMinutes(), dtNow.getSeconds(), this.scrollPause);
    elmControl = document.getElementById(sControlID);
    elmControl.ResumeDateTime = dtResume;
}

// Supporting functions
function NewsScroller_RenderChildren()
{
    var sControlID = this.renderedControl;
    elmControl = document.getElementById(sControlID);
    
    // <DIV>
    elmDiv = document.createElement("div");
    elmDiv.style.position = "absolute";
    elmDiv.style.left = "0px";
    elmDiv.style.width = "100%";
    elmDiv.style.height = "100%";
    elmDiv.style.overflow = "hidden";
    elmControl.appendChild(elmDiv);


    for (var nItem = 0; nItem < this.itemCount; nItem++)
    {
        var sItemName = sControlID + nItem.toString();
        
        var elmP = document.createElement("p");
        elmP.id = sItemName;
        elmP.style.position = "relative";
        elmP.style.top = "0px";
        elmP.style.width = "100%";

        elmP.style.marginTop = "0px";
        elmP.style.marginBottom = "0px";

        elmP.className = this.itemNormalClassName;

        elmDiv.appendChild(elmP);
        
        var elmA = document.createElement("a");
        elmA.className = this.itemNormalClassName;
        elmA.href = this.itemsLink[nItem];
        elmA.innerHTML = this.itemsText[nItem];
        elmA.style.textDecoration = "none";
        elmA.target="News";
        elmP.appendChild(elmA);
        
        
        //var tn = document.createTextNode(this.itemsText[nItem]);
        //elmA.appendChild(tn);
        
    }
}

function NewsScroller_ScrollNews()
{
    var ns = window.NewsScrollerInstance;
    var sControlName = ns.renderedControl;
    if (sControlName.length == 0)
    {
        window.alert ("Do not call ScrollNews directly. Use the Start method of the NewsScroller object.");
        return;
    }
    var elmControl = document.getElementById(sControlName);
    if (new Date() >= elmControl.ResumeDateTime)
    {
        // see whether any item is about to reach the top,
        var cyOffset = 0;
        for (var nItem = 0; nItem < ns.itemCount; nItem++)
        {
            var sItemName = sControlName + nItem.toString();
            var elmItem = document.getElementById(sItemName);
            if ((elmItem.offsetTop > 0) && ((elmItem.offsetTop - ns.scrollStep) <= 0))
            {
                // the top of this item has reached the top of the control,
                // so pause scrolling for the whole control
                var dtNow = new Date();
                var dtResume = new Date(dtNow.getFullYear(), dtNow.getMonth(), dtNow.getDate(), dtNow.getHours(), dtNow.getMinutes(), dtNow.getSeconds(), ns.scrollPause);
                elmControl.ResumeDateTime = dtResume;
                cyOffset = elmItem.offsetTop;
            }
        }
        if (cyOffset > 0)
        {
            // control is just now paused, so scroll all items up 
            // in order to put the top item flush with the top of the control
            for (var nItem = 0; nItem < ns.itemCount; nItem++)
            {
                var sItemName = sControlName + nItem.toString();
                var elmItem = document.getElementById(sItemName);
                elmItem.style.pixelTop = elmItem.style.pixelTop - cyOffset; 
            }
        }
        else
        {
            // the control is not paused, so scroll every item up by one step
            for (var nItem = 0; nItem < ns.itemCount; nItem++)
            {
                var sItemName = sControlName + nItem.toString();
                var elmItem = document.getElementById(sItemName);
                elmItem.style.pixelTop -= ns.scrollStep;
                
                
            }
        }
        // see whether any items have scrolled off the top
        for (var nItem = 0; nItem < ns.itemCount; nItem++)
        {
            var sItemName = sControlName + nItem.toString();
            var elmItem = document.getElementById(sItemName);
            if ((elmItem.offsetTop + elmItem.offsetHeight) <= 0)
            {
                // the bottom of this item has scrolled beyond the top of the control,
                // so move it to the bottom of the control
                if (ns.itemCount > 1)
                {
                    var sBottomItemName;
                    if (nItem == 0)
                        sBottomItemName = sControlName + (ns.itemCount - 1).toString();
                    else
                        sBottomItemName = sControlName + (nItem - 1).toString();
                    var elmBottomItem = document.getElementById(sBottomItemName);
                    elmItem.style.pixelTop = (elmBottomItem.offsetTop + elmBottomItem.offsetHeight + ns.cySeparator) - (elmItem.offsetTop - elmItem.style.pixelTop);
                }
                else
                {
                    elmItem.style.pixelTop = elmItem.parentElement.offsetHeight;
                }
            }
        }
    }
}


function changeSheets(whichSheet)
{
    whichSheet=whichSheet-1;
    
    if(document.styleSheets)
    {
        var c = document.styleSheets.length;

        for(var i=0;i<c;i++)
        {
            if(i!=whichSheet)
            {
                document.styleSheets[i].disabled=true;
            }
            else
            {
                document.styleSheets[i].disabled=false;
            }
        }
    }
}