Thank you for replying me..
And this is my code:
<form name="frmAdd" method="POST" action="add.php?Status=Add" onsubmit="return CheckFormAdd();" enctype="multipart/form-data">
<TABLE cellspacing="0" cellpadding="2" width="90%" border="1" bordercolorlight="#77AADD" bordercolordark="FFFFFF" bgcolor="#CCEEFF" dir=rtl align=center>
<!-- some data here -->
<tr><td colspan=2>
<INPUT TYPE="hidden" name="varTB" value="<?=$varTB?>">
<center><input type="submit" value="OK" name="B1" style="font-family: Tahoma">
<input type="reset" value="Cancel" name="B2" style="font-family: Tahoma"></center>
</td></tr>
</table>
</form>