[JavaScript] 마우스 위치에서 레이어 띄우기

<script type="text/javascript">
<!--
     function abspos(e){
    this.x = e.clientX + (document.documentElement.scrollLeft?document.documentElement.scrollLeft:document.body.scrollLeft);
    this.y = e.clientY + (document.documentElement.scrollTop?document.documentElement.scrollTop:document.body.scrollTop);
    return this;
}

function higher(obj,e){

    if(!e) e = window.Event;
    pos = abspos(e);
    obj.style.left = pos.x+"px";
    obj.style.top = (pos.y+15)+"px";
    obj.style.display = "";
}
//-->
</script>
<div id="layer01" style="position: absolute; display:none;">입력내용</div>
<a href="#" onclick="higher(document.all['layer01'], event);">레이어 보이기</a>