function loadContent(url, target) {
  //document.getElementById(target).innerHTML = '<br><br><br><br><br><br><center><img src=/images/ajax-loader.gif></center>';
  if (window.XMLHttpRequest) {
	req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
	req = new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (req != undefined) {
	req.onreadystatechange = function() {loadContentDone(url, target);};
	req.open("GET", url, true);
	req.send("");
  }
}  

function loadContentDone(url, target) {
  if (req.readyState == 4) { // only if req is "loaded"
	if (req.status == 200) { // only if "OK"
	  document.getElementById(target).innerHTML = req.responseText;
	} else {
	  document.getElementById(target).innerHTML="Error loading content:\n"+ req.status + "\n" +req.statusText;
	}
  }
}