/* Returns the source element of an event */
function sourceElement(e)
{
    if (window.event)
    {
        e = window.event;
    }

    return e.srcElement? e.srcElement : e.target;
}

/* Returns a document element using the Firefox friendly getElementById */
function documentElement(id)
{
    return document.getElementById(id);
}

/* Returns the source element of an event */
function sourceElement(e)
{
    if (window.event)
    {
        e = window.event;
    }

    return e.srcElement? e.srcElement : e.target;
}

/* Cancels an event, preventing further bubbling and returning false to cancel default behavior */
function cancelEvent(e)
{
    e.returnValue = false;
    e.cancelBubble = true;

    if (e.stopPropagation)
    {
        e.stopPropagation();
        e.preventDefault();
    }
}

/* Returns an elements absolute position, allowing for the non-scrolling header */
function getElementPosition(e)
{
    var offsetLeft = 0;
    var offsetTop = 0;

    while (e)
    {
        // Allow for the scrolling body region in IE
        if (msieversion() > 4)
        {
            offsetLeft += (e.offsetLeft - e.scrollLeft);
            offsetTop += (e.offsetTop - e.scrollTop);
        }
        else
        {
            offsetLeft += e.offsetLeft ;
            offsetTop += e.offsetTop;
        }

        e = e.offsetParent;
    }

    if (navigator.userAgent.indexOf('Mac') != -1 && typeof document.body.leftMargin != 'undefined')
    {
        offsetLeft += document.body.leftMargin;
        offsetTop += document.body.topMargin;
    }

    return {left:offsetLeft,top:offsetTop};
}