title: POST action SESSION variables Deletes
body: <p>I have an index.php contains a javascript code to change my form action</p>
  
  <pre><code>&lt;script&gt;
  window.onload=function() {
  document.getElementsByName("myproject")[0].onchange=function() {
  var path = this.value;
  if (path) this.form.action=path+'/main.php';
  }
  }
  &lt;/script&gt;
  </code></pre>
  
  <p>this script changes my form action everytime i change its value, then i have also a</p>
  
  <pre><code>&lt;form action = "" method = "POST"&gt;&lt;table&gt;
  &lt;td&gt;Select Project: &lt;/td&gt;&lt;td&gt;&lt;select name="myproject" id="myproject"&gt;
  &lt;td&gt;USERNAME: &lt;/td&gt;&lt;td&gt;&lt;input type="text" name="user" id="user"/&gt;&lt;/td&gt;
  &lt;td&gt;PASSWORD: &lt;/td&gt;&lt;td&gt;&lt;input type="password" name="pass" id="pass"/&gt;&lt;/td&gt;
  &lt;option value=""&gt;Please Select&lt;/option&gt;
  &lt;option value="Exam1"&gt;Exam1&lt;/option&gt;
  &lt;/select&gt;&lt;/td&gt;
  &lt;input type = "submit" name="login"/&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>and i also have a php code. this ive got</p>
  
  <pre><code>&lt;?php
  session_start();
  error_reporting(0);
  $_SESSION['user'] = "";
  $_SESSION['pass'] = "";
  if ($_POST['login'])
  { 
  $_SESSION['user'] = $_POST['user'];
  $_SESSION['pass'] = $_POST['pass'];
  ?&gt;
  </code></pre>
  
  <p>when i redirected to my Exam1/main.php , i lose the SESSION variables. my Exam1/main.php contains this code to determine if i got the session variables</p>
  
  <pre><code>&lt;?php
  session_start();
  error_reporting(0);
  $mainuser = $_SESSION['user'];
  $mainpass = $_SESSION['pass'] ;
  echo $mainpass.$mainuser;
  ?&gt;
  </code></pre>
  
  <p>Why am i losing the session variables.</p>