<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
</head>
<body>
<select id="id3" name="option[230]" class="select-menu">
<option value="21" points="0" price_prefix="+" price="0.0000">1</option>
<option value="22" points="0" price_prefix="+" price="1000.0000">2(+1000.00 р.)</option>
<option value="23" points="0" price_prefix="+" price="2000.0000" selected="selected" >3(+2000.00 р.)</option>
<option value="24" points="0" price_prefix="+" price="3000.0000">4(+3000.00 р.)</option>
</select>
<script>
var select = document.getElementById('id3');
var indx = select.selectedIndex || 0;
alert(select.options[indx].text);
</script>
</body>
</html>