function ajax_main_request() {
  $('#AJAXcontent').html('<p style="text-align:center;"><img src="images/ajax-loader.gif" width="220" height="19" /></p>');
}

function ajax_media_request() {
  $('#media').html('<p style="text-align:center;"><img src="images/ajax-loader.gif" width="220" height="19" /></p>');
}

function ajax_about_request() {
  $('#about').html('<p style="text-align:center;"><img src="images/ajax-loader.gif" width="220" height="19" /></p>');
}