[Rise]

<form name="form1">
	<input type="radio" name="check" value="267"><label>200</label>
	<input type="radio" name="check" value="879"><label>500</label>
	<input type="radio" name="check" value="1245"><label>1000</label>
</form>
<div>Цена: <span id="price">267</span></div>

<script>
document.form1.check[0].checked = true;
for (var key in document.form1.check) {
	document.form1.check[key].onchange = function () {
		document.getElementById('price').innerHTML = this.value;
	}
}
</script>