ProVal, это тебе т.с. для зстравки...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script>
function Add() {
var os=document.getElementById('list')
var o
o=document.createElement('option')
o.innerHTML='test'
os.appendChild(o)
}
</script>
</head>
<body onload='Add()'>
<select id='list'>
</select>
</body>
</html>