function startLoading() {
	  Element.show('progress');
	  Element.hide('content');
	}
	function finishLoading() {
	  Element.show('content');
	  setTimeout("Element.toggle('progress');", 1000);
	}
	function loadContent(id,url) {
	  startLoading();
	  new Ajax.Updater(id,url,{asynchronous:true});
	  finishLoading();
	}