Here's some code I'm using.

In ajax.js
var text;
var GotResponse;
var LoopCount;

function createRequestObject(){
  var ro=3Dnull;                          // local Request Object
  try{                                  // Firefox, Opera 8.0+, Safari
    ro=3Dnew XMLHttpRequest();
  }
  catch(e){                             // Internet Explorer
    try{
      ro=3Dnew ActiveXObject("Msxml2.XMLHTTP");
    }
    catch(e){
      try{
        ro=3Dnew ActiveXObject("Microsoft.XMLHTTP");
      }
      catch(e){
        document.write("no ajax");
      }
    }
  }
  return ro;    // return Request Object based on browser type
}


var http =3D createRequestObject(); // create http based on browser type

function sndReq(url) {
  http.open('get', url);
  http.onreadystatechange =3D handleResponse;
  http.send(null);
}


function handleResponse() {
  if(http.readyState =3D=3D 4){
    var response =3D http.responseText;
    var line =3D new Array();
    var NumLines=3D0;
    line=3Dresponse.split('\n');  // one line per index
    NumLines=3Dline.length;       // how many lines we split response in to
    for(i=3D0;i<NumLines-1;i++){  // we have a null string after the last \=
n
      eval(line[i]);
    }
    GotResponse=3D1;
    t=3D100; // send next request out in 100ms
  }
}


In my html page:

          function TimedRefresh(){
            sndReq("/dynamic.cgi");
            t=3DsetTimeout("TimedRefresh()",500);
          }


dynamic.cgi is of the form

a=3D~a~;
b=3D~b~;
c=3D~c~;

etc.

TimedRefresh() is called on a page load. It sends a request to
dynamic.cgi. The web server responds with variable =3D value javascript
statements. HandleResponse executes those lines, updating the javascript
variables. After the response, the timeout is set to 100ms instead of the
original 500ms to speed things up.

So... that's what I'm doing...

Harold


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