I'm somewhat new to javascript/DHTML, and this problem has been
plaguing me. I have made an 'array' of <div> tags within my html
document like so:

<div id="menu"> menu1 </div>
<div id="menu"> menu2 </div>
<div id="menu"> menu3 </div>
<div id="menu"> menu4 </div>

<span onclick="showOr Hide('menu[0]')">...