<form?name="ff">
????phone：<input?type="text"?id="123"?name="qq">
</form>
<script>
????ff.qq.onchange?=?function(){
????????this.value?=?check_phone(this.value);
????};
????function?check_phone(Phone){
????????if?(?/^\s*1[34578]{1}\d{9}\s*$/.test(Phone)?)?return?Phone.replace(/(^\s*)|(\s*$)/g,?"");
????????check_phone(prompt('請輸入正確的手機號：'));
????}
</script>怎么改才對？
輸入了正確的手機號，卻顯示undefined
hhhzihao2
2017-02-27 15:52:40
