Javascript

In a recent project I needed to check a radio button based on whether or not a text field was populated.

<script language="javascript" type="text/javascript">
    if (document.frmCreateAccount.EMail.value=="")
      {
        document.frmCreateAccount.OKToEMailYes.checked=true;
      }
    else if (document.frmCreateAccount.EMail.value!="")
      {
      }
</script>