// JavaScript Document
function check_code() {
frm = document.form;
xmlHttp=GetXmlHttpObject();
document.getElementById("code_result").innerHTML = ""; 
var url="functions/check_code.php";
var to_send = "code="+frm.security_code.value;
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("POST",url,true);
xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xmlHttp.send(to_send);
}
function stateChanged() {
document.getElementById("code_result").innerHTML = "";
if (xmlHttp.readyState==4 && xmlHttp.status == 200) var returned_text = xmlHttp.responseText;
if (xmlHttp.readyState==3) document.getElementById("code_result").innerHTML = 'Checking...';
if (returned_text == 'ok') document.getElementById("code_result").innerHTML = 'Correct!'; 
if (returned_text == 'wrong') { 
  document.getElementById("code_result").innerHTML = 'Wrong Code!!';
  frm.security_code.value = 'Try Again';
  frm.security_code.select();
  frm.security_code.focus();
  }
}