js获取鼠标点击事件的相对位置

<html>
<head>
<title>位置</title>
<script language="javascript" type="text/javascript">
function m(){
document.getElementById("area").innerHTML=event.clientX +" , "+event.clientY;
}

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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;800px;height:800px;"> </div>
<div id="area"></div>
<div style="1400px;height:300px;border:1px solid red;padding-left:1200px;">
<div id="d" style="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>
原文地址:https://www.cnblogs.com/zhwl/p/4539818.html