onchange

[rfb]

Moin

<div id="footer"><span class="r">rechts</span>links</div>  
<form name="form1" method="post" action="">  
    <select name="select" onChange="document.getElementById('hier').firstChild.data=this.value">  
      <option value="20">20</option>  
      <option value="30">30</option>  
    </select>  
</form>  
<p id="hier">Platzhalter</p>

Gruß
rfb