function chk_data()
{
	if ( mail_form.name.value == "" )
		{
			alert("請填寫準媽咪姓名");
			mail_form.name.focus();
		}
	else if ( mail_form.tel.value == "" )
		{
			alert("請填寫聯絡電話");
			mail_form.tel.focus();
		}
	else if ( mail_form.add.value == "" )
		{
			alert("請填寫聯絡住址");
			mail_form.add.focus();
		}
	else if ( mail_form.add2.value == "" )
		{
			alert("請填寫生產醫院");
			mail_form.add2.focus();
		}
	else if ( mail_form.add3.value == "" )
		{
			alert("請填寫送餐地址");
			mail_form.add3.focus();
		}
	else if ( mail_form.time.value == "" )
		{
			alert("請填寫預產期");
			mail_form.time.focus();
		}
	else if ( mail_form.fetus.value == "" )
		{
			alert("請填寫胎數");
			mail_form.fetus.focus();
		}
	else if ( mail_form.email.value == "" )
		{
			alert("請填寫電子郵件");
			mail_form.email.focus();
		}
	else if ( mail_form.email.value == "" || (mail_form.email.value.indexOf('@',0) == -1 || mail_form.email.value.indexOf('.',0) == -1))
		{
			alert("電子郵件填寫有錯哦");
			mail_form.email.focus();
		}
	else
		{
			return true;
		}
	return false;
}