// http://www.jeffsarmiento.com/2008/06/05/jquery-image-replacement/
$(document).ready(function() {
  replaceImages();
});

function replaceImages() {
  for(i=1;i<=6;i++) {
    $('h'+i+'.img').each(function() {
      string = jQuery.trim($(this).text());
      filename = string.toLowerCase().replace(/ /g, '_').replace(/([^0-9a-z_])/g,'');
      if (filename.length > 32) filename = filename.substring(0,32);
      $(this).html('<img src="i/content/headings/' + filename + '.gif" alt="' + string + '" />');
    });
  }
}