How do I display a sting, based on which id is set as selected?

I'd like to display a text string (to be positioned above ul) depending on which link is set to selected by the chgClass fuction. The ids for each display via an alert right now, but I can't seem to make them appear in "english". I know I can set up an array stating "id=text string" but when I do it seems to break the code I already have...

<script type="text/javascript">

var Lst;

function CngClass(obj){ 
if (typeof(obj)=='string') obj=document.getElementById(obj);
if (Lst) Lst.className=''; 
obj.className='selected'; 
Lst=obj; 
alert(obj.id);
}

</script>

</head>

<body onload="CngClass('POSITION_WITHOUT_NOTIFY')">
    <div class="slider">
        <ul class="bar">
            <li class="deny"><a onclick="CngClass(this);" id="POSITION_NOT_ALLOWED" href="#">Deny</a></li>
            <li class="askDeny"><a onclick="CngClass(this);" id="NOTIFY_POSITION_IF_GRANTED" href="#">Ask Deny</a></li> 
            <li class="askAllow"><a onclick="CngClass(this);" id="NOTIFY_POSITION_IF_NO_RESPONSE" href="#">Ask Allow</a></li>
            <li class="notify"><a onclick="CngClass(this);" id="NOTIFY_POSITION" href="#">Notfiy</a></li>
            <li class="allow"><a onclick="CngClass(this);" id="POSITION_WITHOUT_NOTIFY" href="#">Allow</a></li>

        </ul> 
    </div>
</body>

</html>

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How do I display a sting, based on which id is set as selected?

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