AJAX Pulling from and Pushing to PHP

[l33t H4X0R]

What I need is some AJAX script that could every few seconds check the output of a PHP file and If a button was clicked, tell that to the PHP file, and check the output again, without refreshing the page.

Please Help, I'm a total JavaScript N00B.

P.S. If you need anymore details please ask

[devnull69]

"check the output" ... for what?

Generally you can do something like this:

var button = 'notpressed';
var everyFewSeconds = 3;
var xmlhttp = null;

function buttonPressed() {
   button = 'pressed';
}

function makeAjax() {
   if(!window.XMLHttpRequest) {
      alert('Your browser is outdated');
   } else {
      xmlhttp = new XMLHttpRequest();
      xmlhttp.open('GET', 'path/to/your.php?button=' + button, true);
      xmlhttp.onreadystatechange = handleResponse;
      xmlhttp.send();
      button = 'notpressed';
   }
}
makeAjax();

function handleResponse() {
   if(xmlhttp.readyState==4) {
      if(xmlhttp.status==200) {
         // you can CHECK the output of the script here
         // it is available as xmlhttp.responseText
      }
      setTimeout(makeAjax, everyFewSeconds * 1000);
   }
}

HTML:
<input type="button" onclick="buttonPressed()"/ value="Press me!">

The button state will be available to PHP in $_GET["button"] ... it is either "pressed" or "notpressed"

[l33t H4X0R]

Lovely, thanks a great deal.
What the PHP page will output will be just "yes" or "no" depending on whether it is your turn. What I need the JavaScript to do with that is to display some HTML (the button) if the output is "yes" and if "no" to display some other HTML.

[l33t H4X0R]

Just Declaring no further help is needed. I have managed to adapt the source code provided above and if working perfectly. Thanks a huge deal.

[l33t H4X0R]

Correction to my above post. I do need more help, I was thinking about making a new thread but it directly relates to this. How to I do more than one XMLHttpRequest? I have tried it by duplication the code and changing the variable name but it goes blank. Please help. I really like the the community in this forum so I hope I get response soon.