求非absolute的div的坐标

Question

<div id="a1">jgign </div> 
<div id="a2">nio2 </div> 
<script language="JavaScript">
<!--
alert(document.getElementById("a1").offsetLeft)
//-->
</script>

Answer 1

absolute 的没那些的
你可以往上找，找父节点的offsetLeft 

Answer 2

function pageX(obj){
return obj.offsetParent?
obj.offsetLeft + pageX(obj.offsetParent):
obj.offsetLeft;
}
function pageY(obj){
return obj.offsetParent?
obj.offsetTop + pageY(obj.offsetParent):
obj.offsetTop;
}
obj是要定位的对象

Answer 3

document.getElementById("a1").getBoundingClientRect().left