쪽지알림 코드좀 봐주세요.

아래는 쪽지 알림코드입니다.
우측 아래에 보여지게되는데.. 좀더 위로 올리고 싶은데 코드중 어떤 수치를 조절해야 우측아래에 출려되는 쪽지알림창이 중간쯤에 출력될 수 있을까요?
----- 이하코드 -----------------
<!-- 연 레이어로 쪽지창 표시 시작 -->
<script language="JavaScript1.2">

var msn_closed = true;
var msn_top = 0;
var msn_left = 0;
var msn_divheight = 165;
var msn_divwidth = 204;

function do_check() {
msn_closed = false;
}

function msn_position() {
if(!msn_closed) {
msn_top = document.body.scrollTop + document.body.clientHeight - msn_divheight;
msn_left = document.body.clientWidth - msn_divwidth;
document.all.memochk.style.top = msn_top;
document.all.memochk.style.left = msn_left;
document.all.memochk.style.display = "";
}
}

var old_ResizeHandler = window.onresize;
window.onresize = new Function("{if (old_ResizeHandler != null) old_ResizeHandler(); msn_position();}");
var old_ScrollHandler = window.onscroll;
window.onscroll = new Function("{if (old_ScrollHandler != null) old_ScrollHandler(); msn_position();}");

function hideLayer(layer) {
if(document.layers) {
layer = eval('document.layers.' + layer);
if(layer.display != 'none') layer.display = 'none';
else layer.display = '';
return;
}
layer = document.all[layer];

if(layer.style.display != 'none') {
layer.style.display='none';
}
else {
layer.style.display='';
}
msn_closed = true;
}

</script>


<?
// 레이어로 쪽지창 표시 시작
if($memo_not_read != '0') {
echo " <embed src='$g4[bbs_path]/img/memo_on.swf' loop='false' width='1' height='1'></embed>";
$run = "<script language=\"JavaScript\">do_check(); msn_position();</script>";
}
else {
$run = "";
}
?>


<div id="memochk" name="memochk" style="position:absolute; overflow:hidden; top:10; left:10; z-index:1; display:none; width:203; height:165; layer-background-color:rgb(255,204,255);">

<table width="200" height="160" align="center" border="0" cellspacing="0" cellpadding="0" background="<?=$g4[bbs_path]?>/img/msg_back.png">
<tr>
<td align=left height=20>
<font color="black"><?=$img_icon?> &nbsp; ::: 쪽지알림 :::</font>
</td>
<td align=right>
<a href="javascript:hideLayer('memochk')"><b>&nbsp;&nbsp;</b></a>&nbsp;
</td>
</tr>
<tr>
<td colspan=2 align=center>
<br>읽지 않은 쪽지가<br><b><?=$memo_not_read?></b>개 있습니다.<br>확인 하시겠습니까?<br><br>
<button style="border: 1px solid #93ACCF" onclick="window.open('<?=$g4[bbs_path]?>/memo.php','member_memo','width=610,height=460,status=no,toolbar=no,resizable=yes,scrollbars=yes');hideLayer('memochk');">쪽지열기</button> &nbsp;&nbsp; <button style="border: 1px solid #93ACCF" onclick='hideLayer("memochk")'> 창닫기 </button><br>
<br>
</td>
</tr>
</table>
</div>

<?=$run?>