function Button(url, tooltip)
{
  document.write('<img src="' + url + '" alt="' + tooltip + '" title="' + tooltip +'" height="42" hspace="6" border="0" width="128">');
}
function LearnMoreButton(product_name)
{
  var url="http://www.riverblade.co.uk/images/stories/learnmore.png";
  var tooltip = "Learn more about " + product_name;

  Button('http://www.riverblade.co.uk/images/stories/learnmore.png', 'Learn more about ' + product_name);
}
function DownloadButton(trial_length)
{
  Button('http://www.riverblade.co.uk/images/stories/download.png', 'Download now - free 30 day free trial');
}
function BuyNowButton()
{
  Button('http://www.riverblade.co.uk/images/stories/buynow.png', 'Buy licences in our online store (credit cards and purchase orders accepted)');
}