//telephone check
function isTeleph(s,msg){
	var reg=/^[-0-9.]*$/gi
	if(reg.test(s.value))return true
	else {
		alert((msg?msg:'Please check Telephone Number!'));
		s.focus();
		s.select();
		return false;
	}
}

//email check
function isEmail(s,msg){
	if (s.value.length==0)return true;
	var reg = /^([a-z]){1,}([\.a-z0-9_\-]){1,}([a-z0-9]){1,}@([a-z0-9_-]){3,}(\.([a-z0-9]){2,4}){1,2}$/gi; 
	if (reg.test(s.value))return true;
	else {
		alert((msg?msg:'Please check E_mail!'));
		s.focus();
		s.select()
		return false;
	}
}