Onmouseover for complete novice

[Toby A Inkster]

<div id="layer1" style="visibility:visible"
onMouseover="this.style.visibility='hidden';
document.all['layer2'].style.visibility='visible'">something</div>
<div id="layer2" style="visibility:hidden"

onMouseout="this.style.visibility='hidden';document.all['layer1'].styl
e.visibility='visible'">else</div>

document.all is IE specific, you should use DOM

Browsers without CSS support will display both versions at once.

Could you rewrite my example using DOM, please ?

Instead of document.all['someID'] use document.getElementById('someID').