testa:
<html>
<head></head>
<body>
<form>
<select>
</select>
</form>
<script type="text/javascript">
text = new String("list ruta")
varde = new String("varde")
for(i=0;i<10; i++){
MY_NUM = new Number(i)
MY_NUM += 1
document.forms[0].elements[0].options.length=MY_NUM;
document.forms[0].elements[0].options.text=text+MY_NUM
document.forms[0].elements[0].options.value=varde+MY_NUM
}
</script>
</body>
</html>