Changing output on selection change

[magi]

Hey everyone, i am creating a calculator liek thing for an online game i run.

 

I asked in the php thread and was told Javascript would be the best choice, however im not familiar with Javascript.

 

What i have is

 

                   

            echo'  <td height="22">Race Selection:</td>
<td height="22"><select class="inputp" name="Empiremenu">';
                                                
if ($_POST[Empiremenu]==1) $s1="selected";	
if ($_POST[Empiremenu]==2) $s2="selected";	
if ($_POST[Empiremenu]==3) $s3="selected";
if ($_POST[Empiremenu]==4) $s4="selected";
if ($_POST[Empiremenu]==5) $s5="selected";
if ($_POST[Empiremenu]==6) $s6="selected";
if ($_POST[Empiremenu]==7) $s7="selected";
if ($_POST[Empiremenu]== $s8="selected";
if ($_POST[Empiremenu]==9) $s9="selected";
echo'<option value="1" '.$s1.'>Dwarven (Lexima)</option>';
echo'<option value="2" '.$s2.'>Imperials (Lexima)</option>';
                echo'<option value="3" '.$s3.'>Shinobi (Lexima)</option>';
echo'<option value="4" '.$s4.'>Templars (Celestial)</option>';
echo'<option value="5" '.$s5.'>Treefolk (Celestial)</option>';
echo'<option value="6" '.$s6.'>Avians (Celestial)</option>';
echo'<option value="7" '.$s7.'>Abominations (Hexion)</option>';
echo'<option value="8" '.$s8.'>Orcs (Hexion)</option>';
echo'<option value="9" '.$s9.'>Snowkin (Hexion)
</option></select></td></tr>';


                if($_POST[1]){echo' g-unit'; }

 

 

What i want to happen is that when i change the option, i want the page to refresh and have the different text there as the unit. However i cannot get either to work so any help would be much appreciated.