function reloadAide(fileName, id) {

    if ($(id).innerHTML != '') {
    	if ($(id))
    		$(id).innerHTML = '';
	}
	else {
    	var url = 'aide.do?file='+fileName;
    	new Ajax.Updater({success:id, failure:'page'}, url, 
    	    {
    	      method: 'get',
    	      evalScripts: true
    	    }
    	);
	}
}