Form data not available after ajax call

[gamesmstr]

I am writing a blackjack game for my website and I am having difficulties submitting the bet form.  The value of the bet is not available after the ajax submission.  I have tried a myriad of formats, but no luck.  Any help would be appreciated.

 

Here is the launching file "cas_bj.php

<?php
session_start();
include("gameconfig.php");
$title = "Immortalix Casino - Blackjack";
if(!$email || !$password){
error("field");
exit;
}
if($playerinfo[jailtime] > 0){
error("jail");
exit;
}
if($playerinfo[password] != $password){
error("password");
}
else{
include("include/inc-top-ajax.php");
echo('<script type="text/javascript" src="js/ajax-cas-bj.js"></script>');
$bet=0;
$gold=$playerinfo[gold];
?>
  <center>
    <div id="casinobox" class="casinobox">
    	<table width="649" height="449" border="1" cellpadding="5">
      	<tr>
      	<td width="100" align="center"><?php echo"$playerinfo[username]";?></td>
        <td><img src="images/cards/cardback.jpg"></td>
        </tr>
       	<tr>
      	<td width="100" align="center">Dealer</td>
        <td><img src="images/cards/cardback.jpg"></td>
        </tr>
      </table>
    </div>
    <br />
    <div id="betbox" class="betbox">
    <input type="button" value="Begin Game" onclick="javascript:formaction('begin',<?php echo"$bet"; ?>);" />
    </div>
  </center>
<?php
}
include("bottom.php");
?>

 

Here is the file "ajax-cas-bj.php"

<?php
session_start();
include("../gameconfig.php");
if(!$email || !$password){
error("field");
exit;
}
if($playerinfo[jailtime] > 0){
error("jail");
exit;
}
if($playerinfo[password] != $password){
error("password");
}
else{
echo('<script type="text/javascript" src="../js/ajax-cas-bj.js"></script>');
$action=$_POST["action"];
$player=$_POST["player"];
$player2=$_POST["player2"];
$dealer=$_POST["dealer"];
$bet=$_POST["bet"];
$bet2=$_POST["bet2"];
$c="j";
$s="s";
if ($action == "begin"){
	?>
	<center>
      <form name="betform" action="javascript:formaction('placebet',bet); return false;">
        <table>
          <tr>
          	<?php echo"<td><input type=text id=bet width=5 value=$bet /></td>"; ?>
            <td><input type="submit" value="Submit Bet" /></td>
           </tr>
        </table>
      </form>
	</center>
	<?php
}
elseif($action == "placebet"){
	echo"test $bet";
//		if ($bet > $playerinfo[gold]){

}
}
?>

 

And finally my ajax code ajax-cas-bj.js

function createXMLHttpRequest() {
	if (typeof XMLHttpRequest != 'undefined') { 
		return new XMLHttpRequest(); 
	} 
	try { 
		return new ActiveXObject("Msxml2.XMLHTTP"); 
	} catch (e) {
			try { 
				return new ActiveXObject("Microsoft.XMLHTTP"); 
			} catch (e) {}
	}
	return false; 
}

function blackjack(action,player,player2,dealer,bet,bet2) {
	var xmlHttp11_out = createXMLHttpRequest();

	params = "action=" + action + "&player=" + player + "&player2=" + player2 + "&dealer=" + dealer + "&bet=" + bet + "&bet2=" + bet2;
	xmlHttp11_out.open("POST","ajax/ajax-cas-bj.php", true);
	xmlHttp11_out.setRequestHeader("Content-Type","application/x-www-form-urlencoded");

	xmlHttp11_out.onreadystatechange = function() {
		if(xmlHttp11_out.readyState == 4 && xmlHttp11_out.status == 200) {
			document.getElementById("casinobox").innerHTML = xmlHttp11_out.responseText;
			refresh_stats();				
		}
	}
	xmlHttp11_out.send(params);
}

function refresh_stats() {
	var xmlHttp12_out = createXMLHttpRequest();

	params = '';

	xmlHttp12_out.open("POST","ajax/statsajax.php", true);
	xmlHttp12_out.setRequestHeader("Content-Type","application/x-www-form-urlencoded");

	xmlHttp12_out.onreadystatechange = function() {
		if(xmlHttp12_out.readyState == 4 && xmlHttp12_out.status == 200) {
			var brokenstring = xmlHttp12_out.responseText.split("-@[-");

			if ( brokenstring[0] == 'stats' ) {
				document.getElementById("statbox").innerHTML = brokenstring[1];
			}
		}
	}
	xmlHttp12_out.send(params);
}

function formaction(action,bet) {
	var xmlHttp13_out = createXMLHttpRequest();

	params = "action=" + action + "&bet=" + bet;
	xmlHttp13_out.open("POST","ajax/ajax-cas-bj.php", true);
	xmlHttp13_out.setRequestHeader("Content-Type","application/x-www-form-urlencoded");

	xmlHttp13_out.onreadystatechange = function() {
		if(xmlHttp13_out.readyState == 4 && xmlHttp13_out.status == 200) {
			document.getElementById("betbox").innerHTML = xmlHttp13_out.responseText;
			refresh_stats();				
		}
	}
	xmlHttp13_out.send(params);
}

 

It launches fine, gives the bet form, but nothing happens on the submit bet action.