<script language="javascript">
	function show_it() {
		document.getElementById("show_link").style.display = "none"
		document.getElementById("hide_link").style.display = "inline"
		document.getElementById("it").style.display = "block"
	}

	function hide_it() {
		document.getElementById("show_link").style.display = "inline"
		document.getElementById("hide_link").style.display = "none"
		document.getElementById("it").style.display = "none"
	}
</script>

<a id="show_link" href="#" onclick="show_it();">Show It</a>
<a id="hide_link" href="#" onclick="hide_it();" style="display:none">Hide It</a>
<div id="it" style="display:none">
	This is it.
</div>