var loading = "<table width=100% height=100%><tr><td align=center><img src='images/loading.gif'></td></tr></table>";


function loadTag(tag) {
  AjaxRequest.get(
    {
      'url':'index.php?tag='+tag
      ,'onLoading':function() { document.getElementById('mainContent').innerHTML = loading; }
      ,'onSuccess':function(req){ document.getElementById('mainContent').innerHTML = req.responseText; }
      ,'onError':function(req){ alert('Error!\nStatusText='+req.statusText+'\nContents='+req.responseText);}
      ,'timeout':2000
      ,'onTimeout':function(req){ alert('Timed Out!'); }      
    }
  );

 }  
 
 function loadIMGx(img, target) {
    document.getElementById(target).innerHTML = "<img src='"+img+"'>";
 }  
 function loadIMG(img, target) {
    document.getElementById(target).src = img;
 }