How to count checkboxes in a form

Hello everyone,
I am by no means a programmer and need some help solving a problem I have been having. I created a form on my website, and I would like for it to count the number of checkboxes a user selects. browed some forums and other websites to find a solution; however, when I insert the code, it doesn't seem to work. Maybe I'm putting it in the wrong place? This is the code to my form. Can someone please edit it so that it will count the selected checkboxes? That way, I can just easily insert it back into my website.I would really appreciate any help or advice

YOU SUBMIT YOUR PICKS, MAKE SURE YOU ONLY CHECKED 10 BOXES!
</font> </p>
<table width="100%" border="0" cellspacing="0" cellpadding="10">
<tr align="left" valign="top">
<td width="19%" class="style13"><font size="3" color="#FFFFFF">Alias:</font></td>
<td width="32%" class="style13">
<font size="4">
 <input type="text" Name="Alias" size="45">
</font>
</td>
<td width="19%" class="style13"><font size="3" color="#FFFFFF">Email Address:</font></td>
<td width="30%" class="style13">
<font size="4">
 <input name="Email" type="text" id="email" size="45">
</font>
</td>
</tr>
<tr align="left" valign="top">
<td class="style13"><font size="3" color="#FFFFFF">Pick 1 Winner:</font></td>
<td class="style13">
<font size="4">
<select name="Winner" size="1" id="Winne_ Pool">
<option>None</option>
<option>Arizona</option>
<option>Baltimore</option>
<option>Atlanta</option>
<option>Buffalo</option>
<option>Carolina</option>
<option>Chicago</option>
<option>Cincinnati</option>
<option>Cleveland</option>
<option>Dallas</option>
<option>Denver</option>
<option>Detroit</option>
<option>Green Bay</option>
<option>Houston</option>
<option>Indianapolis</option>
<option>Jacksonville</option>
<option>Kansas City</option>
<option>Miami</option>
<option>Minnesota</option>
<option>New England</option>
<option>New Orleans</option>
<option>New York Giants</option>
<option>New York Jets</option>
<option>Oakland</option>
<option>Philadelphia</option>
<option>Pittsburgh</option>
<option>San Diego</option>
<option>San Francisco</option>
<option>Seattle</option>
<option>St. Louis</option>
<option>Tampa Bay</option>
<option>Tennessee</option>
<option>Washington</option>
</select>
 </font></td>
<td class="style13"><font size="3" color="#FFFFFF">Pick 1 Loser:</font></td>
<td class="style13">
<font size="4">
<select name="Loser" size="1" id="Loser_Pool">
<option>None</option>
<option>Arizona</option>
<option>Baltimore</option>
<option>Atlanta</option>
<option>Buffalo</option>
<option>Carolina</option>
<option>Chicago</option>
<option>Cincinnati</option>
<option>Cleveland</option>
<option>Dallas</option>
<option>Denver</option>
<option>Detroit</option>
<option>Green Bay</option>
<option>Houston</option>
<option>Indianapolis</option>
<option>Jacksonville</option>
<option>Kansas City</option>
<option>Miami</option>
<option>Minnesota</option>
<option>New England</option>
<option>New Orleans</option>
<option>New York Giants</option>
<option>New York Jets</option>
<option>Oakland</option>
<option>Philadelphia</option>
<option>Pittsburgh</option>
<option>San Diego</option>
<option>San Francisco</option>
<option>Seattle</option>
<option>St. Louis</option>
<option>Tampa Bay</option>
<option>Tennessee</option>
<option>Washington</option>
</select>
</font>
</td>
</tr>
</table>
<p align="center" class="style13"><font size="3" color="#FFFFFF">Comments/Questions? Let me know!</font></p>
<p align="center">
<textarea name="message" cols="75" rows="5" id="message"></textarea>
</p>
<p align="center" class="style13">
<input type="submit" name="Submit" value="I'm Ready! Submit my choices!">
</p>
</form>
<p class="style1">  </p></td>
</tr>

</script>
</table>
</div>
</body>
</html>