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I have a login page and when i input my username and department and i click the submit button i link to another webpage..the problem is when i clickthe back button i go back to the login page. I want that I couldnot go back to login page because i am already login..i don't know what could be the code for that..this is my code in login:
<?php
session_start();
//require_once 'conn.php';
$host="localhost";
$root="root";
$password="";
$db_name="dspi";
mysql_connect("$host", "$root", "$password") or die("Cannot connect to server");
mysql_select_db("$db_name")or die("Cannot select DB");
$department = mysql_real_escape_string($_POST['department']);
$username = mysql_real_escape_string($_POST['username']);
$sql=mysql_query("SELECT `Department`, `Username` FROM `tbllogin` WHERE `Department` = '{$department}' AND Username = '{$username}'") or die(mysql_error());
$ct = mysql_num_rows($sql);
if($ct == 1) {
$row = mysql_fetch_assoc($sql);
if($row['Department']=='Accounting') {
header('location: accounting.php');
} elseif($row['Department']=='Engineering') {
header('location: engineering.php');
} elseif($row['Department']=='Finishing_Goods') {
header('location: finishing_goods.php');
} elseif($row['Department']=='HRAD') {
header('location: HRAD.php');
} elseif($row['Department']=='MIS') {
header('location: MIS.php');
} elseif($row['Department']=='Packaging_and_Design') {
header('location:packaging_design.php');
} elseif($row['Department']=='Production') {
header('location:production.php');
} elseif($row['Department']=='Purchasing_Logistic') {
header('location:purchasing_logistic.php');
} elseif($row['Department']=='QA_and_Technical') {
header('location:QA_technical.php');
} elseif($row['Department']=='Supply_Chain') {
header('location:supply_chain.php');
}
else {
header('location:loginv01.php');
echo"Incorrect Username or Department";
}
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script TYPE="text/javascript">
<!--
function submitenter(myfield,e)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;
if (keycode == 13)
{
myfield.form.submit();
return false;
}
else
return true;
}
//-->
</SCRIPT>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<style type="text/css">
<!--
BODY {
background-image: url(layout_image/bgroundv03.png);
background-attachment: fixed;
}
#Layer1 {
position:absolute;
width:200px;
height:115px;
z-index:1;
left: 82px;
top: 95px;
}
#Layer2 {
position:absolute;
width:229px;
height:49px;
z-index:1;
left: 441px;
top: 262px;
}
#Layer3 {
position:absolute;
width:186px;
height:32px;
z-index:2;
left: 452px;
top: 275px;
}
#Layer4 {
position:absolute;
width:82px;
height:35px;
z-index:3;
left: 516px;
top: 320px;
}
#Layer5 {
position:absolute;
width:60px;
height:29px;
z-index:4;
left: 524px;
top: 328px;
}
#Layer6 {
position:absolute;
width:130px;
height:55px;
z-index:5;
left: 319px;
top: 208px;
}
#Layer7 {
position:absolute;
width:230px;
height:46px;
z-index:6;
left: 441px;
top: 216px;
}
#Layer8 {
position:absolute;
width:200px;
height:115px;
z-index:7;
left: 45px;
top: 100px;
}
#Layer9 {
position:absolute;
width:59px;
height:28px;
z-index:7;
left: 70px;
top: 96px;
}
#Layer10 {
position:absolute;
width:216px;
height:30px;
z-index:7;
left: 453px;
top: 228px;
}
-->
</style>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<div id="Layer3">
<select name="department" onkeypress="return submitenter(this,event)">
<option>Choose your Department. . . . . . </option>
<option value="Accounting" <?php if($_POST['department'] == 'Accounting') echo "selected='selected'"; ?>>Accounting</option>
<option value="Engineering" <?php if($_POST['department'] == 'Engineering') echo "selected='selected'"; ?>>Engineering</option>
<option value="Finishing_Goods" <?php if($_POST['department'] == 'Finishing_Goods') echo "selected='selected'"; ?>>Finishing Goods</option>
<option value="HRAD" <?php if($_POST['department'] == 'HRAD') echo "selected='selected'"; ?>>HRAD</option>
<option value="MIS" <?php if($_POST['department'] == 'MIS') echo "selected='selected'"; ?>>MIS</option>
<option value="Packaging_and_Design" <?php if($_POST['department'] == 'Packaging_and_Design') echo "selected='selected'"; ?>>Packaging and Design</option>
<option value="Production" <?php if($_POST['department'] == 'Production') echo "selected='selected'"; ?>>Production</option>
<option value="Purchasing_Logistic" <?php if($_POST['department'] == 'Purchasing_Logistic') echo "selected='selected'"; ?>>Purchasing and Logistics</option>
<option value="QA_and_Technical" <?php if($_POST['department'] == 'QA_and_Technical') echo "selected='selected'"; ?>>QA and Technical</option>
<option value="Supply_Chain" <?php if($_POST['department'] == 'Supply_Chain') echo "selected='selected'"; ?>>Supply Chain</option>
</select>
</div>
<div id="Layer5">
<input type="submit" name="Submit" value="Submit"/>
</div>
<div id="Layer2"><img src="layout_image/subframev02.png" width="229" height="50" /></div>
<div id="Layer4"><img src="layout_image/subframev02.png" width="80" height="46" /></div>
<div id="Layer6"><img src="layout_image/userv01.png" width="131" height="62" /></div>
<div id="Layer7"><img src="layout_image/subframev02.png" width="229" height="50" /></div>
<div id="Layer10">
<input name="username" type="text" size="30" />
</div>
</form>
</body>
</html>
This post has been edited by Rhoda Rose: 19 July 2010 - 01:07 AM
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