Pozdrawiam

EDIT:
Znalazłem

Problem rozwiązany.
Dla zainteresowanych:
Kod
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="pl">
<head>
<title>Jack-Web textarea resizer</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<script type="text/javascript">
function resize(co, ile){
(d=document.getElementById(co)).style.height=d.offsetHeight+ile+"px";
}
onload=function(){
var textarea=document.getElementById('text');
var plus=document.createElement('span');
plus.appendChild(document.createTextNode('+'));
plus.onclick=function(){resize('text',30)}
var minus=document.createElement('span');
minus.appendChild(document.createTextNode('-'));
minus.onclick=function(){resize('text',-30)}
document.body.insertBefore(minus,textarea.nextSibling);
document.body.insertBefore(plus,minus);
}
</script>
</head>
<body>
<textarea id="text"></textarea>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="pl">
<head>
<title>Jack-Web textarea resizer</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<script type="text/javascript">
function resize(co, ile){
(d=document.getElementById(co)).style.height=d.offsetHeight+ile+"px";
}
onload=function(){
var textarea=document.getElementById('text');
var plus=document.createElement('span');
plus.appendChild(document.createTextNode('+'));
plus.onclick=function(){resize('text',30)}
var minus=document.createElement('span');
minus.appendChild(document.createTextNode('-'));
minus.onclick=function(){resize('text',-30)}
document.body.insertBefore(minus,textarea.nextSibling);
document.body.insertBefore(plus,minus);
}
</script>
</head>
<body>
<textarea id="text"></textarea>
</body>
</html>