AJAX responseText cuestión

<script type="text/javascript">        
        var xmlhttp
        function manageRecentView(transaction)
        {
            xmlhttp=GetXmlHttpObject();
            if (xmlhttp==null)
            {
                alert ("Your browser does not support AJAX!");
                return;
            }
            var url="recentview_manager.asp?trx=" + transaction;
            xmlhttp.onreadystatechange=stateChanged;
            xmlhttp.open("GET",url,true);
            xmlhttp.send(null);
        }
        
        function GetXmlHttpObject()
        {
            if (window.XMLHttpRequest)
            {
                // code for IE7+, Firefox, Chrome, Opera, Safari
                return new XMLHttpRequest();
            }
            if (window.ActiveXObject)
            {
                // code for IE6, IE5
                return new ActiveXObject("Microsoft.XMLHTTP");
            }
        return null;
        }
        
        function stateChanged()
        {
            if (xmlhttp.readyState==4)
            {
                //TIME TO REGET RECENTVIEW        
                document.getElementById("recentViewed").innerHTML=xmlhttp.responseText;
            }
        }     
    </script>

    select case request.querystring("trx")
        case "get"
            recent = getRecent()
            str=""
            for a = 0 to ubound(recent)    
                work = split(recent(a), chr(252))     
                str = str & "<li><a href='" & basepath & "" & work(0) & "' name='recentview'>" & work(1)& "</a></li>"
            next
            if ubound(recent) > 0 then
                str = str & "<li style='text-align:center;'><a href=""javascript&#058;manageRecentView('remove')"" style='font-size:10px;'>Reset List</a></li>"
            end if
            response.write(str)
        case "remove"
            removeRecent()
            response.write("")
    end select