function MouseOverImageLink_ChangeImage(id, direction) 
{
    var sender = document.getElementById(id);
    if (sender != null)
    {
        if (direction == 'over') 
        { 
            if (sender.overImage != null && sender.overImage != '')
            {
                sender.childNodes[0].src = sender.overImage.src; 
            }
        }
        else if (direction == 'out') 
        { 
            if (sender.outImage != null && sender.outImage != '')
            {
                sender.childNodes[0].src = sender.outImage.src; 
            }
        }
    }
}

function MouseOverImageLink_Init(id) 
{
    var sender = document.getElementById(id);
    if (sender != null)
    {
        sender.overImage = new Image();
        sender.overImage.src = sender.overImageUrl;
        sender.outImage = new Image();
        sender.outImage.src = sender.outImageUrl;
  }
}