<script language="javascript" >
function my_options(){
	for(var i=0; i < 4; i++){
		document.getElementById("country").options[i].value = document.getElementById("country").options[i].text;
	}
}
</script>

<select  size="1" name="country" onchange="my_options()">
<option value=1>Бенин</option>
<option value=2>Бермуда</option>
<option value=3>Болгария</option>
<option value=4>Боливия</option>
</select>