function showLarge( img, w, h)
{
  w+= 20;
  h+= 20;
  
  window.open( img, '', 'width=' + w+ ', height=' + h);
}

function showSlipOn( img )
{
  newImg = new Image;
  newImg.src = 'images/slipon/' + img + '.jpg';
	
  document[ 'slipon' ].src = newImg.src;
}

function showDynochart( img )
{
  newImg = new Image;
  newImg.src = 'images/' + img + '.gif';
	
  document[ 'chart' ].src = newImg.src;
}

function showDynochartPNG( img )
{
  newImg = new Image;
  newImg.src = 'images/' + img + '.png';
	
  document[ 'chart' ].src = newImg.src;
}