查找元素的偏移客户端位置 [英] Finding the offset client position of an element
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问题描述
如何使用Javascript查找元素的偏移客户位置? (我假设可以用BHO或Gecko/NPAPI编写相同的代码).
How to find the offset client position of an element using Javascript? (I assume the same code can be written in a BHO or Gecko/NPAPI).
我面临的问题是一种找出元素的偏移客户位置的方法. e.srcElement.offsetX/Y
并不总是给出正确的值(clientX/Y也是如此).在某些情况下,我们还需要考虑父元素滚动.
The problem I am facing is a way to find out the offset client position of the element. The e.srcElement.offsetX/Y
does not give the correct value always (same goes for clientX/Y). In some cases we also need to consider the parent element scroll.
我们一般如何做到这一点?有一个简单的方法吗?
How do we do this in general? Is there an easy way for this?
推荐答案
function getElementTop ( Elem )
{
var elem;
if ( document.getElementById )
{
elem = document.getElementById ( Elem );
}
else if ( document.all )
{
elem = document.all[Elem];
}
yPos = elem.offsetTop;
tempEl = elem.offsetParent;
while ( tempEl != null )
{
yPos += tempEl.offsetTop;
tempEl = tempEl.offsetParent;
}
return yPos;
}
function getElementLeft ( Elem )
{
var elem;
if ( document.getElementById )
{
var elem = document.getElementById ( Elem );
}
else if ( document.all )
{
var elem = document.all[Elem];
}
xPos = elem.offsetLeft;
tempEl = elem.offsetParent;
while ( tempEl != null )
{
xPos += tempEl.offsetLeft;
tempEl = tempEl.offsetParent;
}
return xPos;
}
将元素ID传递给函数.
Pass the element id to the functions.
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