how can i show or hide?

[cute]

hi all,

in a web page, how can i show/hide when appropriate option selected.
for example
whenever i click the show option in html page the table should be displayed
<table>
</table>
whenever i click hide option the table should be hided.

how can i do this via js.
can any one help me..
thanks.

[tech_support]

<a href="#" onClick="document.getElementById('mytable').style.display = 'none';return false">Be gone!</a>
<div id="mytable">
<p>Hello</p>