Got encountered problem in ajax by stopped process but no error

[newphpcoder]

Hi..

I have ajax code for saving data to database
here is my ajax code:

<script type="text/javascript">
var ajaxTimeOut = null;
var ajaxTimeOutOperator = null; 
var responsePHP; // = "no_reply"
var responsePHPOperator;
var changeFocus; //= false;
var transactionWasSaved;

function remoteRequestObject() {
    var ajaxRequest = false;
    try {
        ajaxRequest = new XMLHttpRequest();
    }
    catch(err) {
        try{
            ajaxRequest = new ActiveXObject("MSxml2.XMLHTTP");
        }
        catch(err) {
            try{
                ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
            }
            catch(err){
                // --> change to DOM alert("Not Supported Browser") + err.description;
                notify('Not Supported Browser.');
                return false;
            }
        }
    }
    return ajaxRequest;
} 

//var ajaxRequest; // = remoteRequestObject();
var ajaxRequest = remoteRequestObject();   
var ajaxRequestOperator;
</script>

<script type="text/javascript">
function lotIdCheck(element) {
    if (window.event.keyCode==13 || window.event.keyCode==10) {
        
        var txtElementID = element;
        if (txtElementID.value == "") { return false; }
       // alert(txtElementID.value);
     
                    if (ifMatch(txtElementID.value, document.getElementById('txtLotCode').value)) {
                       capture(element);
                    }
                    else {
                       
                       txtElementID.value = "";
                       txtElementID.focus();
                       notify("Lot ID mismatch.Scan again"); //box instead of this... 
                       
       
        }        
    }    
}


function timeOut(object) { 

  if (ajaxTimeOut != null) {
      window.clearTimeout(ajaxTimeOut);   
  }    
  //alert("this is the reponse " + responsePHP)
   if (changeFocus = false || responsePHP == "no_reply" || ajaxRequest.readyState != 4 && ajaxRequest.readyState != 0) {
      //alert('ajaxRequest not ready');
      ajaxRequest.onreadystatechange = function() {};   
      ajaxRequest.abort();
      document.getElementById(object).disabled = false;
      document.getElementById(object).value = "";
      changeInputType(document.getElementById(object),'password');
 
      document.getElementById(object).focus();
      document.getElementById(object).focus();
      
      var txt = document.getElementById(object);
      if (txt.attachEvent) {
          txt.attachEvent ("onkeypress", function () {lotIdCheck(txt)});
      }  
      //notify("Please Scan again.");  
      alert("Please Scan again.");
      
   }
   else {
      return false;
   }
}

function timeOutOperator() { 

if (ajaxTimeOutOperator !== null) {
      window.clearTimeout(ajaxTimeOutOperator);   
  }    

if (transactionWasSaved = false || responsePHPOperator == "no_reply" || ajaxRequestOperator.readyState != 4 && ajaxRequestOperator.readyState != 0) {
      //alert('ajaxRequest not ready');
      ajaxRequestOperator.onreadystatechange = function() {};   
      ajaxRequestOperator.abort();
      document.getElementById('txtLotCode').disabled = false;
      document.getElementById('txtLotCode').value = "";
      document.getElementById('txtLotCode').focus();
      document.getElementById('txtLotCode').focus();
      //notify("Please Scan again.");  
      alert("Please Scan again.");   
}
   else {
      return false;
   }
}


function clearTiming() {
    changeFocus = true;
    if (ajaxTimeOut !== null) {
      window.clearTimeout(ajaxTimeOut);   
  }  
}

function clearTimingOperator() {
    transactionWasSaved = true;
    if (ajaxTimeOutOperator !== null) {
      window.clearTimeout(ajaxTimeOutOperator);   
  }  
}

function postSet() {
    if (window.event.keyCode==13 || window.event.keyCode==10) {
        document.getElementById('txtLotCode').disabled = true;
        
        verifyLotcode();
    }
}

//------------------------------------------------------------------------------------------------------------------

function verifyLotcode() {
responsePHPOperator = "no_reply";
transactionWasSaved = false;
ajaxRequestOperator = remoteRequestObject();
ajaxRequestOperator.onreadystatechange = function () {
if (ajaxRequestOperator.readyState==4 && ajaxRequestOperator.status==200) {
     //var result = ajaxRequestOperator.responseText;
     
     responsePHPOperator = ajaxRequestOperator.responseText; 
     
   //  alert(responsePHPOperator);
     if (responsePHPOperator == "failed") {
        document.getElementById('txtLotCode').disabled = false;
        document.getElementById('txtLotCode').value = "";
        document.getElementById('txtLotCode').focus();
       // notify("Please scan again.");
       alert("Please scan again.");
     }
     
     if (responsePHPOperator == "0") {
         
     //->> change to DOM    alert("Unauthorized operator");
        // notify("Unauthorized operator.<br />Scan Again.");
        alert("Unauthorized operator.<br/>Scan Again.");
         if (document.getElementById('txtLotCode').disabled) {
             document.getElementById('txtLotCode').disabled = false; 
         } 
         document.getElementById('txtLotCode').value = "";
         document.getElementById('txtLotCode').focus();
     }
     else { 
        // alert ('correct');
         save();                
       //  notify("Transaction has been saved.");
       //  reset();
     }    
   }
} 

var str = document.getElementById('txtLotCode').value;
var url = "validate_lotcode.php?q="+str;
ajaxRequestOperator.open("GET",url , true );           

// force i.e. not to cache
ajaxRequestOperator.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
//---------------------------
ajaxRequestOperator.send(null);
ajaxTimeOutOperator = window.setTimeout("timeOutOperator();", 100000000);              
}

function save() {
 // ajaxRequest = remoteRequestObject();              
    ajaxRequest.onreadystatechange = function () {
    if (ajaxRequest.readyState==4 && ajaxRequest.status==200) {
       var result = ajaxRequest.responseText;
       
       // alert (result);
          
           if (result == "failed") {
             // alert (result);
            document.getElementById('txtLotCode').disabled = false;
            document.getElementById('txtLotCode').value = "";
            document.getElementById('txtLotCode').focus();
            //notify("Please scan again.");
           alert("Please scan again");
           }
           
           if (result == "saved|saved" || result == "saved|saved|saved") {
              //alert(result);
             alert("Transaction has been saved.");
              //notify("Transaction has been saved.");
            //  reset();
           }   
           
       }     
    }      
 
             var parameters = "txtLotCode=" + encodeURI(document.getElementById('txtLotCode').value); 

 var url = "update_dependency.php";  
 

ajaxRequest.open("POST", url, true);
ajaxRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
ajaxRequest.setRequestHeader("Content-length", parameters.length);
ajaxRequest.setRequestHeader("Connection", "close");
ajaxRequest.send(parameters);
}
</script>


<script type="text/javascript">
function reset() {
        // alert ('reset');
       //enable elements
       
       document.getElementById('txtLotCode').disabled = false;
       
       //reset
  
  document.getElementById('txtLotCode').value = "";  
}
</script>

I got problem in function save, even it satisfied this code:

if (result == "saved|saved" || result == "saved|saved|saved") {

but it did not post alert and also not go to reset function.


I don't know why?

Thank you