I have a form with items dynamically created and they all are given the same name but different values. When I read the name on the recieving page I only get the last value that was checked. How do I read all values passed if checked?

Here is my form code:
<form action="comparetest.php" method="get" name="frmTest" id="frmTest">
<table width="1" border="0">
<tr>
<td>Selection1</td>
<td><input name="chkCompare" type="checkbox" id="chkCompare" value="1"></td>
</tr>
<tr>
<td>Selection2</td>
<td><input name="chkCompare" type="checkbox" id="chkCompare" value="2"></td>
</tr>
<tr>
<td>Selection3</td>
<td><input name="chkCompare" type="checkbox" id="chkCompare" value="3"></td>
</tr>
<tr>
<td><input type="submit" name="Submit" value="Submit"></td>
<td>&nbsp;</td>
</tr>
</table>
<p>&nbsp; </p>
</form>

Thanks for any help or tips.