(AJAX Poll) The JavaScript File
Which language do you like the most?

C/C++      Java      Lisp      Perl      PHP      Prolog      Python
When a user chooses an option above, a function called GetVote is executed. The getVote function does the following:
  1. Create an XMLHttpRequest object.

  2. Create the function to be executed when the server response is ready.

  3. Send the request off to a file on the server.

  4. A parameter (vote) with the value of the option is added to the URL.
view source
print?
01function getVote( int ) {
02  if ( window.XMLHttpRequest ) {
03    // code for IE7+, Firefox, Chrome, Opera, Safari
04    xmlhttp = new XMLHttpRequest( );
05  }
06  else {
07    // code for IE6, IE5
08    xmlhttp = new ActiveXObject( "Microsoft.XMLHTTP" );
09  }
10  xmlhttp.onreadystatechange = function( ) {
11    if ( ( xmlhttp.readyState == 4 ) &&
12         ( xmlhttp.status     == 200 ) ) {
13      document.getElementById("poll").innerHTML =
14        xmlhttp.responseText;
15    }
16  }
17  xmlhttp.open( "GET", "PollVote.php?vote="+int, true );
18  xmlhttp.send( );
19}




      A skeleton walks into a bar.    
      The bartender says, “What’ll you have?”    
      The skeleton says, “Gimme a beer and a mop.”    
      — John Goodman