本文实例讲述了JS获取鼠标相对位置的方法。分享给大家供大家参考，具体如下：
<!DOCTYPE HTML>
<html lang="en-US">
<head>
<meta charset="UTF-8"/>
<title>位置</title>
<script language="javascript" type="text/javascript">
function m(){
document.getElementById("area").innerHTML=event.clientX +" , "+event.clientY;
}
function c(){
var objTop = getOffsetTop(document.getElementById("d"));//对象x位置
var objLeft = getOffsetLeft(document.getElementById("d"));//对象y位置
var mouseX = event.clientX+document.body.scrollLeft;//鼠标x位置
var mouseY = event.clientY+document.body.scrollTop;//鼠标y位置
//计算点击的相对位置
var objX = mouseX-objLeft;
var objY = mouseY-objTop;
clickObjPosition = objX + "," + objY;
alert(clickObjPosition);
}
function getOffsetTop(obj){
var tmp = obj.offsetTop;
var val = obj.offsetParent;
while(val != null){
tmp += val.offsetTop;
val = val.offsetParent;
}
return tmp;
}
function getOffsetLeft(obj){
var tmp = obj.offsetLeft;
var val = obj.offsetParent;
while(val != null){
tmp += val.offsetLeft;
val = val.offsetParent;
}
return tmp;
}
</script>
</head>
<body style="margin:0px;" onmousemove="m();">
<div style="padding:90px;border:1px solid #ccc;font-size:36px;width:800px;height:800px;"> </div>
<div id="area"></div>
<div style="width:1400px;height:300px;border:1px solid red;padding-left:1200px;">
<div id="d" style="width:200px;height:200px;border:1px solid green;padding:10px;cursor:hand;" onclick="c()">这里是图片，因为我用div边框1px，所以两个div会有2px的位置偏移，你可以自己调整</div>
</div>
</body>
</html>
希望本文所述对大家JavaScript程序设计有所帮助。
