HTML Form Not Submitting

i have an html form. it doesn't work when you press enter or submit. Here's the code for the form.

<table width="50%" border="1" cellspacing="0" cellpadding="0" align="center">
  <tr>
    <form name="form1" method="post" action="joke_search.asp">
      <td colspan="2" bgcolor="#0000FF">
        <div align="center"><b>Search Options</b></div>
      </td>
    </form>
  </tr>
  <tr>
    <td width="25%" bgcolor="#0099FF">
      <div align="right">Search By:</div>
    </td>
    <td width="25%">
      <select name="tos">
        <option value="JokeName">Joke Name</option>
        <option value="AdditionDate">Addition Date (mm/dd/yyyy)</option>
        <option value="ID">Joke ID</option>
      </select>
    </td>
  </tr>
  <tr>
    <td width="25%" bgcolor="#0099FF">
      <div align="right">Search for:</div>
    </td>
    <td width="25%">
      <input type="text" name="st">
    </td>
  </tr>
  <tr>
    <td colspan="2">
      <div align="center">
        <input type="submit" value="Search">
      </div>
    </td></form>
  </tr>
</table>

can you refere us to this joke site  ?

it worked fine after i removed that extra form tag... thanks guies. (i can't believe i missed that one) As for a reference to the joke site... it opens on january 1st. I'll post details later.