auto update data from AJAX posting form

Question

I am using an AJAX script to post data from a form and return the processed data from a php file. The script is below.

    function loadXmlDoc(hashtag){
    var xmlhttp;
    if (window.XMLHttpRequest){
        xmlhttp = new XMLHttpRequest();
    }
    else{
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange = function(){
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200){
            document.getElementById("ajaxify").innerHTML = xmlhttp.responseText;
        }
    }
    xmlhttp.open("POST", "demo_ajax3.php", true);
    xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xmlhttp.send("hashtag=" + hashtag);
    }

However I want to auto update the results. how would I get this to auto update so it checks for more data? Or what would be the best way?

There seems to be nothing about getting AJAX forms to auto refresh from what I've seen so any help would be greatly apprecaited

Answer 1

Try this way. It should auto-update the result every 10 seconds.

var xmlhttp;
if (window.XMLHttpRequest){
    xmlhttp = new XMLHttpRequest();
}
else{
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function(){
  if (xmlhttp.readyState == 4 && xmlhttp.status == 200){
    document.getElementById("ajaxify").innerHTML = xmlhttp.responseText;
  }
}
function loadXmlDoc(hashtag){
  var repeat = function () {
    xmlhttp.open("POST", "demo_ajax3.php", true);
    xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xmlhttp.send("hashtag=" + hashtag);
  };
  repeat.hashtag = hashtag;
  setInterval(function() { repeat(); },10000);
}