div - position - offsetParent

[Vittore Zen]

Hi,

a little question.

I have some nested tables with some divs (so default set is relative - ok?)

Now, i need to draw a line from one div to another. The problem is to
find the position of div

I use these functions:

function findPosX(obj)
{
var curleft = 0;
if (obj.offsetParent)
{
while (obj.offsetParent)
{
curleft += obj.offsetLeft
obj = obj.offsetParent;
}
}
else if (obj.x)
curleft += obj.x;
return curleft;
}

function findPosY(obj)
{
var curtop = 0;
if (obj.offsetParent)
{
while (obj.offsetParent)
{
curtop += obj.offsetTop
obj = obj.offsetParent;
}
}
else if (obj.y)
curtop += obj.y;
return curtop;
}



But these give an error on offsetParent. The browser (IE 6) says that is
null (or it isn't a object).

Any idea?

Thanks
v.

 

[Martin Honnen]

I have some nested tables with some divs (so default set is relative - ok?)

What is "default set"?

Now, i need to draw a line from one div to another. The problem is to
find the position of div

I use these functions:

function findPosX(obj)
{
var curleft = 0;
if (obj.offsetParent)
{
while (obj.offsetParent)
{
curleft += obj.offsetLeft
obj = obj.offsetParent;
}
}

I would rather use
if (typeof obj.offsetLeft != 'undefined') {
do {
curleft += obj.offsetLeft;
obj = obj.offsetParent;
}
while (obj)
}

But these give an error on offsetParent. The browser (IE 6) says that is
null (or it isn't a object).

For which line? And what do you pass in as obj when you call the function?