function changeLocation()
        {
            var x= document.getElementById("state");
            var val = x.options[x.selectedIndex].value;// value selected by user in state is assigned to variable var

            var xhttp;
            if (window.XMLHttpRequest)
            { // Mozilla, Safari, ...
                 xhttp = new XMLHttpRequest();
            }
            else if (window.ActiveXObject)
            { // IE 8 and older
                xhttp = new ActiveXObject("Microsoft.XMLHTTP");
            }
            xhttp.open("GET","localhost/location.php?t=" + val,true);//variable being sent is t
            xhttp.send(null);

            xhttp.onreadystatechange = function()//error checking required
            {
                 if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
                {
                    //document.getElementById("location").value = xmlhttp.responseText;
                    var ajaxdisp = document.getElementById("location")
                    ajaxdisp.innerHTML = xmlhttp.responseText;//need to look through full manual for it
                }
                else
                {
                    alert("needs Debugging");
                }
             }
        }

<?php
            include "logconnect.php";
            $t = $_REQUEST["t"];
            $result = $conn->query("SELECT DISTINCT location FROM office where state = '".$t."'");
            $disp = "<select>";
            while($row = $result->fetch_assoc())
            {
                $disp .= "<option>";
                $disp .= $row['location'];
                $disp .= "</option>";
            }
            $disp .= "</select>";
            echo $disp;?>