function DoSubmit(oFrm){
	oFrm.action="letter.php";
	oFrm.target="mypopup";
	oFrm.method="POST";
	var oWin = window.open("", oFrm.target, "height=400,width=400,toolbar=no,location=no,directories=no,status=no,menubar=no");
	oWin.focus();
}