CSS-Eigenschaften eines <div> ändern, wenn class=xy

[Rouven]

Hi!

<div class="oben" onmouseover="xyz()">div 1</div>

<div class="oben" id="mydiv1" onmouseover="xyz("mydiv1")">div 1</div>

<div class="unten" onmouseover="xyz()">div 1</div>

<div class="unten" id="mydiv2" onmouseover="xyz("mydiv2")">div 1</div>

function xyz(divid) {
 if (!(document.getElementById)) return false;

var nd = document.getElementById(divid);
 if (!(nd)) return false;

var cls = nd.class;
 if (!(cls)) return false;

alert("Klasse ist "+cls);

if (cls == "oben")
   nd.class = "unten";
}

so als Beispiel...

MfG
Rouven