How to extract target of an anchor under mouse pointer

I am trying to redevelop firefox addon, to give it more funcionality. I found JS file where all the functions are and started to edit it.

What I want to achieve is to get target of an anchor under mouse pointer (when mouse pointer is over anchor, I right click and call addon from context menu).

For example when I have anchor which HTML code is:

<a href="somewehere.com/place">place</a>

when I right click on this code and call my addon I would like to alert its href (somewehere.com/place)

I wrote a function:


function ff()
{
var current_target=this.href;
alert(current_target);
}

but it gives me udefined on alert

http://i56.tinypic.com/au7gk1.png

Any hints to achieve this are highly appreciated.

Thanks

<a href="http://www.google.com" onclick = "ff(this)">place</a>

<script type = "text/javascript">
function ff(which) {
var current_target=which.href;
alert(current_target);
}
</script>

Or more simply:-


<a href="http://www.google.com" onclick = "ff(this.href)">place</a>

<script type = "text/javascript">
function ff(which) {
alert (which);
}
</script>

Quizmaster: The TV show "The Merits of Ferrets" stars which kind of animal?
Contestant: I don't know.
Quizmaster: There's a clue, if you know where to look.
Contestant: I'm sorry, no.
Quizmaster (laughing): The answer is ferrets.
Contestant: Well, how was I supposed to know that?

Philip M, thanks for your attention

But in my case link does not have onclick event, which is used by left click.

In my case it would be:


<a href="http://www.google.com">place</a>

<script type = "text/javascript">
function ff() {
var current_target=href;
alert(current_target);
}
</script>

But it doesn't work.

To clarify, let's imagine you right click on a link, context menu pops out, and you choose position "Copy shortcut" - I need THIS shortcut.

Thanks anyway

------------------------------------

I also tried:


function ff()
{
var rr=document.links[this].href;
alert(rr);
}


But it doesn't work, but it shows what I want to achieve. I want to get href of THIS (mouse is over it) link...