if (form.m_tel.value.length!=0) { 
	  if (!form.m_tel.value.match(/^\(?\d{2}\)?[\s\-]?\d{3,4}\-?\d{4}$/) ) {
		   alert( "電話格式不正確") 
	 		form.m_tel.focus();
	 		return false; 
		}
	}