function addFriend(receiver)
{
    showLoading();
    callAJAX("friend_xoad_handler","addFriend",$H({receiver:receiver}),addFriend_callback);    
}
function addFriend_callback(result)
{  
	endLoading();  
    if (result=="OK")
    {        
        $('message_box').style.display = "";
        setElementCenterScreen('message_box');
    }
    else
		msgBox(result);
}

function sendFriendRequest(receiver)
{
    $('message_box').style.display = "none";
    showLoading();
    callAJAX("friend_xoad_handler","sendFriendRequest",$H({receiver:receiver,select:$("message_box_select").value,message:$('message_content').value}),sendFriendRequest_callback);
}

function sendFriendRequest_callback(result)
{
    endLoading();
	if (result == "OK")
	{
		msgBox("Yêu cầu kết bạn đã được gửi.");
	}	
	else
		msgBox(result);
}

function deleteFriend(friend_mb_id)
{
	command ='callAJAX("friend_xoad_handler","deleteFriend",$H({friend_mb_id:"' + friend_mb_id + '"}),deleteFriend_callback)';
	confirmBox("Bạn có chắc muốn xóa khỏi danh sách không?",command);
}

function deleteFriend_callback(result)
{	
	window.location.href=window.location.href;	
}

function limitText(limitField, limitCount, limitNum) 
{
	if (limitField.value.length > limitNum) {
		limitField.value = limitField.value.substring(0, limitNum);
	} else {
		limitCount.value = limitNum - limitField.value.length;
	}
}


function replyMessage(message, sent_date)
{
    showLoading($('frm_message_detail'));
	callAJAX("xoad_handler","replyMessage",$H({message:message, sent_date:sent_date}),replyMessage_callback);
}

function replyMessage_callback(result)
{
    endLoading($('frm_message_detail'));
    if (result == "OK")
    {
        $('message_box').style.display = "";
        setElementCenterScreen('message_box');
    }
    else
    {
        msgBox(result);
    }
}