Hi Good day!

I have a delete button and now I got a problem in getting the employee id which i want to delete.

here is my code:

Code:
<?php
    session_start();
    ob_start();
    date_default_timezone_set("Asia/Singapore");
    error_reporting(0);
    include 'connection.php';
    
$save = isset($_POST['save']);
$update = isset($_POST['update']);
$delete = isset($_POST['delete']);


if ($save)
{
    $employee_id    = $_POST['employee_id'];
    $lastname       = $_POST['lastname'];  
    $firstname      = $_POST['firstname'];
    $middlename     = $_POST['middlename'];
    $process_id     = $_POST['process_id'];
    
    
    $check_empid = "SELECT COUNT(employee_id) AS employee_id FROM operators where employee_id = '$employee_id'";
    $res_emp_id = mysql_query($check_empid, $con);
    
     if(mysql_result($res_emp_id, 0, "employee_id") > 0)
     {
            $sysmessage = "Employee ID: $employee_id already exists.";
     }
     else
     {
    $sql_insert =
    "INSERT INTO operators
    (employee_id, lastname, firstname, middlename, process_id)
    VALUES
    ('$employee_id', '$lastname', '$firstname', '$middlename', '$process_id')";
    $res = mysql_query($sql_insert, $con);
    echo header("Location:operator.php");
     }

}

//----update code-----//

if($update)
{
    $employee_id    = $_POST['employee_id'];
    $lastname       = $_POST['lastname'];  
    $firstname      = $_POST['firstname'];
    $middlename     = $_POST['middlename'];
    $process_id     = $_POST['process_id'];
    
    $sql_update = "UPDATE operators SET employee_id = '$employee_id', lastname = '$lastname', firstname = '$firstname',
     middlename = '$middlename', process_id = '$process_id' WHERE employee_id = '$employee_id'";
    $res_update = mysql_query($sql_update, $con);
    echo header("Location:operator.php");
}   
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<title>Operators List</title>
<head>
<link rel="stylesheet" type="text/css" href="op_report.css" />
<script type="text/javascript" src="jquery.js"></script>
<script type='text/javascript' src='jquery.autocomplete.js'></script>
<link rel="stylesheet" type="text/css" href="jquery.autocomplete.css" />

<link rel="stylesheet" type="text/css" href="filtergrid.css" />
<script language="javascript" type="text/javascript" src="tablefilter.js"></script>  
<script language="javascript" type="text/javascript" src="tablefilter_all.js"></script>
<script language="javascript" type="text/javascript" src="tablefilter_all_min.js"></script>



<link rel="stylesheet" type="text/css"  href="prompt.css">
<link rel="stylesheet" type="text/css"  href="notify.css">

<script type="text/javascript" src="prompt.js"> </script>
<script type="text/javascript" src="notification.js"> </script>
<script type="text/javascript">

//----auto complete process name---//
$().ready(function() {
    $("#process").autocomplete("get_process_list.php", {
       width: 145,
        matchContains: true,
        mustMatch: true,
        selectFirst: false
    });
    
    $("#process").result(function(event, data, formatted) {
        $("#process_id").val(data[1]);
    });
    });

//------auto complete employee id----//
$().ready(function() {
    $("#emp_id").autocomplete("get_op_data.php", {
       width: 145,
        matchContains: true,
        mustMatch: true,
        selectFirst: false
    });
    
    $("#emp_id").result(function(event, data, formatted) {
    $("#employee_id").val(data[0]);
    });
    
    $("#emp_id").result(function(event, data, formatted) {
        $("#lastname").val(data[1]);
    });
    
    $("#emp_id").result(function(event, data, formatted) {
    $("#firstname").val(data[2]);
    });
    
    $("#emp_id").result(function(event, data, formatted) {
    $("#middlename").val(data[3]);
    });
    
    $("#emp_id").result(function(event, data, formatted) {
    $("#process").val(data[4]);
    });
    
    });    
    
/*AJAX*/
function AJAX(){
        var xmlHttp;
        try{
            xmlHttp=new XMLHttpRequest(); // Firefox, Opera 8.0+, Safari
            return xmlHttp;
            }
        catch (e){
            try{
                xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); // Internet Explorer
                return xmlHttp;
                }
            catch (e){
                try{
                    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
                    return xmlHttp;
                    }
                catch (e){
                    alert("Your browser does not support AJAX!");
                    return false;
                    }
                }
            }
        }
        
//----clear data----//
function clear_data()
{
     document.getElementById('employee_id').value = '';
     document.getElementById('lastname').value = '';
     document.getElementById('firstname').value = '';
     document.getElementById('middlename').value = '';
     document.getElementById('process').value = '';
     document.getElementById('process_id').value = '';
     
}
//------delete---//

function confirmation(id) {
    var answer = confirm("You wish to delete this information?")
    if (answer){
        
        var employee_id = document.getElementById('employee_id').value;
        
        alert(employee_id);
        window.location = "delete_operator.php?id=employee_id";

    }
    else{
       // alert("Your Event is Not Deleted")
    }
}
        

</script>
</head>
<body onload=document.getElementById("employee_id").focus();>
<form name="operator_list" action="" method="post" autocomplete="off">
    <!--Tab List -->
<div id="ddcolortabs">
<ul>
<li id="current"> <a href="operator.php" title="Operator's List"><span>Production Operators</span></a></li>
<li> <a href="supervisor.php" title="Supervisor's List"><span>Production Supervisors</span></a></li>
</ul>
</div>
<br/>
<br/>
<div>
<?php
if($sysmessage)
   {
    echo "<p style='text-align: center; color: #ff0000; font-weight: bold;'>$sysmessage</p>";
   }
 ?>
</div>

<div>
<table>
<tr>
<td>Employee ID Search :</td>
<td><input type="text" name="emp_id" id="emp_id" value=""></td>
</tr>
</table>
</div>
<!-- Fieldset for Operators Information-->
<div id="operators_fieldset">
<fieldset>
<legend>Input Operators Information</legend>
<table>
<tr>
<td>Employee ID: </td>
<td><input type="text" name="employee_id" id="employee_id" value=""></td>
<tr>

<tr>
<td>Lastname: </td>
<td><input type="text" name="lastname" id="lastname" value=""></td>
</tr>

<tr>
<td>Firstname: </td>
<td><input type="text" name="firstname" id="firstname" value=""></td>
</tr>

<tr>
<td>Middlename: </td>
<td><input type="text" name="middlename" id="middlename" value=""></td>
</tr>

<tr>
<td>Process: </td>
<td><input type="text" name="process" id="process" value=""></td>
</tr>
</table>

<input type="hidden" name="process_id" id="process_id" value="" />

<center>
<input type="submit" name="save" id="save" value="Save">
<input type="submit" name="update" id="update" value="Update">
<input type="button" name="delete" id="delete" value="Delete" onclick="confirmation();">
<input type="button" name="clear" id="clear" value="Clear" onclick="clear_data();">
</center>
</fieldset>
</div>
</body>
</html>
and here is my delete_operator.php

Code:
<?php

    ob_start();
    date_default_timezone_set("Asia/Singapore");
    error_reporting(0);
    include 'connection.php';
    $$employee_id = $_POST["id"];
   $sql_delete = "DELETE FROM operators WHERE employee_id = '$employee_id'";
   echo $sql_delete;
   exit;
    $res_delete = mysql_query($sql_delete, $con);
    echo header("Location:operator.php");

?>
when I tried to alert the value of employee_id he gets the value correctly but I got problem here:

Code:
window.location = "delete_operator.php?id=employee_id";
it did not get the id .

I can't figured out what's wrong in my code.

I hope somebody can help me.

Thank you