var http_request = false;

   function makePOSTRequest(url, parameters) {

      http_request = false;

      if (window.XMLHttpRequest) { // Mozilla, Safari,...

         http_request = new XMLHttpRequest();

         if (http_request.overrideMimeType) {

         	// set type accordingly to anticipated content type

            //http_request.overrideMimeType('text/xml');

            http_request.overrideMimeType('text/html');

         }

      } else if (window.ActiveXObject) { // IE

         try {

            http_request = new ActiveXObject("Msxml2.XMLHTTP");

         } catch (e) {

            try {

               http_request = new ActiveXObject("Microsoft.XMLHTTP");

            } catch (e) {}

         }

      }

      if (!http_request) {

         alert('Cannot create XMLHTTP instance');

         return false;

      }

      

      http_request.onreadystatechange = alertContents;

      http_request.open('POST', url, true);

      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

      http_request.setRequestHeader("Content-length", parameters.length);

      http_request.setRequestHeader("Connection", "close");

      http_request.send(parameters);

   }



   function alertContents() {

      if (http_request.readyState == 4) {

         if (http_request.status == 200) {

            //alert(http_request.responseText);

            result = http_request.responseText;

            document.getElementById('mainDisplay').innerHTML = result;            

         } else {

            alert('There was a problem with the request.');

         }

      }

   }

   

   function get(obj) {

      var poststr = "address=" + encodeURI( document.getElementById("address").value ) +

                    "&csz=" + encodeURI( document.getElementById("csz").value );

      makePOSTRequest('index.php', poststr);

   }