I understand that the code below is not state-of-the-art coding, but I'd rather just add a line and not rewrite the whole Form, please.

I'd like to add a required line that basically states "Read These Terms And Click Here To Agree To The Terms" so that the user can't submit the Form info without completing that line. Thanks for any help.

Code:
<table cellpadding="0" cellspacing="0" align="center" width="600">
<tr>
  <td>
    <font face="verdana"><font size="3"><font color=#800000;">[var.result]</font></font><font color="red"><strong>[var.error]</strong></font><br>
    <hr size="1" />
    <br />

    <form action="/page.php?page=1" method="post" name="contact_us" onSubmit="return capCheck(this);">

    <table cellpadding="5" width="100%">
    <tr>
		  <td width="10" class="required_field">*</td>
      <td width="80">Your Name</td>
      <td>&nbsp;&nbsp;&nbsp;&nbsp;<input type="text" name="name" maxlength="50" style="width:300px; border: 1px solid #696969;" /><br/><br/></td>
    </tr>
    <tr>
  <td class="required_field">*</td>
  <td>Email Address</td>
      <td>&nbsp;&nbsp;&nbsp;&nbsp;<input type="text" name="email" maxlength="40" style="width:300px; border: 1px solid #696969;" /><br/><br/></td>
    </tr>
    <tr>
    <td></td>
    
  <td>Subject:</td>
      <td>&nbsp;&nbsp;&nbsp;&nbsp;<input type="text" name="subject" maxlength="40" style="width:300px; border: 1px solid #696969;"/><br/><br/></td>
    </tr>
        <tr>
        <td></td>
      <td>Comments:</td>
      <td>&nbsp;&nbsp;&nbsp;&nbsp;<textarea name="comments" style="width: 100%; height: 250px; background: #F5F5F5; border: 1px solid #F5F5F5;"></textarea><br/><br/></td>
    </tr>
<tr>
      <td class="required_field">*</td>
      <td>Enter Image Code:</td>
      <td>&nbsp;&nbsp;&nbsp;&nbsp;<input type="text" value="" name="captext" style="width: 100px" maxlength="6" /></td>
    </tr>
<tr>
      <td></td>
      <td><a onclick="refresh_security_image(); return false;" style="cursor:pointer;"><u>Refresh Image</u></a></td>
      <td>&nbsp;&nbsp;&nbsp;&nbsp;<img src="includes/captcha.php" border="0" id="verificiation_image" /></a></td>
    </tr>
    </table>
<br/>

<br/>
    <p>
      <input type="hidden" name="submited" value="1" />
      &nbsp;&nbsp;&nbsp;&nbsp;<input type="submit" name="submit" value="&nbsp;&nbsp;&nbsp;&nbsp;Submit&nbsp;&nbsp;&nbsp;&nbsp;" style="margin:7px 10px 0px 0px; padding:10px 0px 10px 0px; font-size:15px; font-style:Century-Gothic;" />
    </p>

    </form>

  </td>
</tr>
</table>