如何测得一张图片的左边坐标和顶部坐标

[ATCG]

如何测得一张图片的左边坐标和顶部坐标

[ATCG]

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[shang515]

function getLeft(obj)
{
var left=0;
do
{
left += obj.offsetLeft-obj.scrollLeft;
obj=obj.parentElement;
}
while(obj.tagName!="BODY")
left -= obj.scrollLeft;//减去BODY的scrollLeft;
return left;
}
function getTop(obj)
{
var top=0;
do
{
top += obj.offsetTop-obj.scrollTop;
obj=obj.parentElement;
}
while(obj.tagName!="BODY")
top -= obj.scrollTop;//减去BODY的scrollTop;
return top;
}

[ATCG]

谢谢！我想知道图片的左边绝对坐标和顶部的绝对坐标

[ATCG]

up

[ATCG]

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