function swapStyleOnMouseOver(objTag,bg_color,font_color) 
{
  objTag.style.backgroundColor = bg_color;
  objTag.style.color  = font_color;
}
function swapStyleOnMouseOut(objTag) 
{
  objTag.style.backgroundColor = '';
  objTag.style.color  = '';
}
function swapColorOnMouseOver(objTag,font_color) 
{
  objTag.style.color  = font_color;
}
function swapColorOnMouseOut(objTag) 
{
  objTag.style.color  = '';
}
// nice for dialup to preload the images.
function preloadRollover()
{
  var image_array = new Array;
  arg = preloadRollover.arguments;
  for(i = 0; i < arg.length; i++)
  {
    image_array[i] = new Image();
    image_array[i].src = arg[i];
  }
}
function swapImage(obj, img_src)
{
  obj.src = img_src;
}