function e(id)
{
    return document.getElementById(id);
}

function tOn(id)
{
    var elems = document.getElementsByTagName('*');
    for(var i = 0; i < elems.length; i++)
        if(elems[i].id == id)
            elems[i].style.display = '';
}

function tOff(id)
{
    var elems = document.getElementsByTagName('*');
    for(var i = 0; i < elems.length; i++)
        if(elems[i].id == id)
            elems[i].style.display = 'none';
}

function GetElementPostion(xElement)
{
    var selectedPosX = 0;
    var selectedPosY = 0;
    var theElement = xElement;

    while(theElement != null)
    {
        selectedPosX += theElement.offsetLeft;
        selectedPosY += theElement.offsetTop;
        theElement = theElement.offsetParent;
    }

    return selectedPosX + "," + selectedPosY
}

function getViewportSize()
{
    var viewportwidth;
    var viewportheight;

    // the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight

    if (typeof window.innerWidth != 'undefined')
    {
      viewportwidth = window.innerWidth,
      viewportheight = window.innerHeight
    }

    // IE6 in standards compliant mode (i.e. with a valid doctype as the first line in the document)

    else if (typeof document.documentElement != 'undefined'
     && typeof document.documentElement.clientWidth !=
     'undefined' && document.documentElement.clientWidth != 0)
    {
       viewportwidth = document.documentElement.clientWidth,
       viewportheight = document.documentElement.clientHeight
    }

    // older versions of IE

    else
    {
       viewportwidth = document.getElementsByTagName('body')[0].clientWidth,
       viewportheight = document.getElementsByTagName('body')[0].clientHeight
    }
    
    var viewport = new Array();
    viewport[0] = viewportwidth;
    viewport[1] = viewportheight;
    return viewport;
}

function setSwapImage()
{
    var imgs = document.getElementsByTagName("img");
    for(var i = 0; i < imgs.length; i++)
    {
        var swapImg = imgs[i].getAttribute("swapImg");
        if (swapImg != null)
        {
            imgs[i].onmouseover = toggleImg;
            imgs[i].onmouseout = toggleImg;
        }
    }
}

function toggleImg(e)
{
    var targ;
    if (!e) var e = window.event;
    if (e.target) targ = e.target;
    else if (e.srcElement) targ = e.srcElement;
    if (targ.nodeType == 3) // defeat Safari bug
        targ = targ.parentNode;
    
    var oldImg = targ.src;
    var swapImg = targ.getAttribute("swapImg");
    targ.src = swapImg;
    targ.setAttribute("swapImg", oldImg);
}