function htmlTransparentPNG(sSrc, iW, iH, sExtra)
{
  if (!sExtra) sExtra = '';
  
  if (document.all) return '<img src="images/spacer.gif" width="' +
    iW + '" height="'+ iH +'" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src = \'' +
    sSrc +'\')"'+ sExtra +'>';
  
  else return '<img src="'+ sSrc +'" width="'+ iW +'" height="'+ iH +'"'+ sExtra +'>';
}

function popup(sURL)
{
  window.open(sURL, 'popup', 'height = 450, width = 400, location = no, menubar = no, ' +
    'resizable = yes, scrollbars = yes, status = yes, toolbar = no');
}