Select - onchange submit form

[rcr]

Hello,

I need some help with this functionality.

I have a table with data:
EMPNO ENAME GRADE
-------- ------- ---------
100 JACK A
101 JOHN B
103 TOM A

I need to create a select item that will list all the names. I want to be able to select one of the names from the drop down. I am passing the grade as a hidden element of the form. I don't want to follow the selection from the drop down with a submit button. Although the list is displaying the names, I really need the grade for further processing, although the name is also important. So, i figured the onchange : this.formname.submit(), might help. However I can't seem to understand where I am making a mistake. This is the code I've written. Do I need some additional javascript code somewhere. If so what do I write ?

<form name="empselect" action="?emp_select" method="post">
<h3>Select the Employees Name:
<select name="employee" id="employee" class="styled-select" onchange="this.empselect.submit()">
<option value="">Select an employee </option>
<?php foreach ($employees as $employee):?>
<option value="<?php echo($employee['empno']);?>">
<?php echo($employee['ename'].'-'.$employee['grade']);?></option>
<?php endforeach;?>
</select> </h3> <br>
<input type="hidden" name="grade" value="<?php echo $employee['grade']?>">
</form>

In the php part that was written above the form, I wrote:
if (isset($_GET['emp_select']))
{
$grade=$_POST['grade'];
echo "grade is" . $grade;
}

However, it is not doing the echo part. Am I making a mistake somewhere. I need to get the grade for further processing on the form, and I needed it from the select.

Your kind assistance is greatly appreciated.

[007Julien]

I am not sure, it is possible to use a querystring, or a GET URI, with a POST !

[TheAliveWinner]

Use

onchange="submit()"

instead of

onchange="this.empselect.submit()"