怎么得到鼠标点击在线图片的位置坐标？

我要在这个位置插入图片或者文字

<script>
function move(){
  document.getElementById("mouse").innerHTML=window.event.clientX+":"+window.event.clientY;
}
</script>
<body onMouseMove="move();">
  <div id="mouse"></div>
</body>
用Rico的API吧,方便很多<img id=imgObj src="kdsfldsfl.gif" onclick="doClick();" ></img><script language=JavaScript>
function doClick()
{
   var imgPos = RicoUtil.toDocumentPosition("mgObj")
   var xPos = imgPos.x;
   var yPos = imgPos.y;
}
</script>
to:lip009(深蓝忧郁)
我要直接得到图片上的坐标位置，比如点击网页上面的图片的左上角应该是0，0
to:qingyuan18(zealot_tang)
Rico是什么啊？thanks!
<div id="mouse">鼠标不在图片上</div>
<div id="img" onMouseMove="move();" onMouseOut="out();" style="position:absolute;top:100px;left:200px;"><img src="" width="400" height="300"></div>
<script>
function move(){
var img=document.getElementById("img");
document.getElementById("mouse").innerHTML=(window.event.clientX-img.offsetLeft)+":"+(window.event.clientY-img.offsetTop);
}
function out(){
document.getElementById("mouse").innerHTML="鼠标离开图片"
}
</script>