function CallAjax() {

    var searchRadius
    var searchZipcode
    searchRadius = document.getElementById("searchRadius").value;
    searchZipcode = document.getElementById("searchZipcode").value;

    //alert("Searching within " + searchRadius + " miles of " + searchZipcode);
    var xmlhttp;
   if (window.XMLHttpRequest) {
        // code for IE7+, Firefox, Chrome, Opera, Safari
        xmlhttp = new XMLHttpRequest();
    }
    else if (window.ActiveXObject) {
        // code for IE6, IE5
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else {
        alert("Your browser does not support XMLHTTP!");
    }
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4) {
            document.getElementById("ServiceResults").innerHTML = "" + xmlhttp.responseText + "";
        }
        if (xmlhttp.readyState != 4) {
            document.getElementById("ServiceResults").innerHTML = "Loading...";
        }
    }
    xmlhttp.open("GET", "ServiceSearch.asp?radius=" + searchRadius + "&zipcode=" + searchZipcode, true);
    xmlhttp.send(null);
}
function submitenter(myfield,e)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;

if (keycode == 13)
   {
   CallAjax();
   return false;
   }
else
   return true;
}