获得select的option值

<select name="opt" onchange="test()"> 
<option value="1">111 
<option value="2">222 
<option value="3">333 
<option value="4">444 
<option value="5">555 
<option value="6">666 
<option value="7">777 
</select> 

<SCRIPT LANGUAGE="JavaScript">
<!--
function test(){
	alert(document.all.opt.options[document.all.opt.selectedIndex].innerText);
	alert(document.all.opt.options[document.all.opt.selectedIndex].value );
	}
//-->
</SCRIPT>