function getAddForm()
{		
	var url = 'ajax/ajax_getCommentForm.php';
	var query_string = 'mode=add';
	var ajax_obj = new Ajax.Request( url, { method: 'post', parameters: query_string, onComplete: callBackGetForm });
}

function getUpdateForm(id)
{		
	var url = 'ajax/ajax_getCommentForm.php';
	var query_string = 'mode=update&id=' + id;
	var ajax_obj = new Ajax.Request( url, { method: 'post', parameters: query_string, onComplete: callBackGetForm });
}

function callBackGetForm(request_obj)
{
	$('staff_comment').innerHTML = request_obj.responseText;
}

function addComment()
{		
	var url = 'ajax/ajax_actionComment.php';
	var comment = $('staffcomment').value;
	
	if(comment != "")
	{
	   var query_string = "mode=add&comment=" + encodeURIComponent(comment);
	   var ajax_obj = new Ajax.Request( url, { method: 'post', parameters: query_string, onComplete: renderCommentList });
	}
}

function updateComment(id)
{
	var url = 'ajax/ajax_actionComment.php';
	var comment = $('staffcomment').value;
	
	if(comment != "")
	{
	   var query_string = 'mode=update&id='+id + "&comment=" + encodeURIComponent(comment);;
	   var ajax_obj = new Ajax.Request( url, { method: 'post', parameters: query_string, onComplete: renderCommentList });
	}
}

function deleteComment(id)
{
	var url = 'ajax/ajax_actionComment.php';
	var query_string = 'mode=delete&id='+id;
	var ajax_obj = new Ajax.Request( url, { method: 'post', parameters: query_string, onComplete: renderCommentList });
}

function renderCommentList(request_obj)
{
	$('staff_comment').innerHTML = request_obj.responseText;	
}