Javascript Error in php submit form

I have a PHP form that submits information to a MySQL database. I have a script that I want to use so when a changed/cancel radio button is clicked, it will put today's date in two fields for the Date Updated, a Hidden DateUpdated2 field and Text DateUpdated field and 2 fields for the date cancelled/closed Date  Closed a Hidden DateClosed2 field and Text DateClosed field. The Hidden fields have a different format from the text fields that is necessary for reporting purposes. Here is the script:

<script language="JavaScript" type="text/JavaScript">

<!-- functions to set the update and cancel dates -->
var d = new Date();
var t_date = d.getDate();      // Returns the day of the month
var t_mon = d.getMonth();      // Returns the month as a digit
var t_year = d.getFullYear();  // Returns 4 digit year

function todaysDateUpdate()
{
 document.form1.DateUpdated.value = (t_mon+1) + "/" + t_date + "/" + t_year;
 document.form1.DateUpdated2.value = t_year + "/" + (t_mon+1) + "/" + t_date;
 document.form1.DateClosed.value =  " ";
 document.form1.DateClosed2.value =  " ";
 document.form1.Approved.value = true;
 document.form1.IntergroupUpdate[2].checked=FALSE;
}

function todaysDateCancel()
{
  document.form1.DateClosed.value = (t_mon+1) + "/" + t_date + "/" + t_year;
  document.form1.DateClosed2.value = t_year + "/" + (t_mon+1) + "/" + t_date;
  document.form1.DateUpdated.value =  " ";
  document.form1.DateUpdated2.value =  " ";
 document.form1.Approved.value = false;
  document.form1.IntergroupUpdate[1].checked=FALSE;
}
//-->
</script>
Here is the url where the page is located:
http://www.ceahow.org/intergroups/update_search.php?IGNumber=90101&Submit=Submit

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