[jQuery] How to use a div as a placeholder for other divs?

[zephyr]

Hi,
I have a <div id="content"> that serves as a placeholder for text. The
text are all like

<div id="about">
test test test
</div>

<div id="links">
link link link
</div>

<div id="contact">
[EMAIL PROTECTED]
</div>

When the user clicks a link, I use it's id attribute value
("about",contact" or "links"). I use that value to show the content of
the corresponding div in div "content". Div "content" is visible, the
others are invisible
I succeed in prepending() the div to div "content":

activeElementId = $(this).attr('id')
$("div#content").prepend($("[EMAIL PROTECTED]"+activeElementId+"]").html())


but if I do this in succession, new texts get appended to exisiting.
Of course I do not want this- I want the text "about" to be shown in
"content" or "links". Not both because append() appends! How can I
remove a div before showing another one?

if(typeof(activeElementId) != "undefined"){
        $("div#content").remove($("div"))
}

gives me an error "t.substring is not a function" when I click a
second link and only the first text is shown

Thanks