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我試圖從用戶那裏得到輸入的姓氏和名字,但是我得到了我對他們兩人的未定義結果。如何從JavaScript中的文本輸入字段獲取值?
function getTextField() {
var fname = document.getElementsByClassName("fname").value;
var lname = document.getElementsByClassName("lname").value;
var message = fname + "\n" + lname;
document.getElementsByClassName("get")[0].innerHTML = message;
}
<form name="cost" autocomplete="on">
First Name:
<br>
<input type="text" name="fname" required placeholder="Enter the first name" pattern="[A-Za-z\-]+" maxlength="25">
<br>Last Name:
<br>
<input type="text" name="lname" required placeholder="Enter the last name" pattern="[A-Za-z\-]+" maxlength="25">
<br>
<br>
<input type="button" onClick="getTextField()" value="Place Order!" />
<br>
<br> <span class="get"></span>
</form>
謝謝!我是新來的JavaScript,我感謝幫助:)。 –