JavaScript 폼 유효성검사

1 개요

JavaScript Form Validation

JavaScript 폼 유효성검사

2 예시

html

Copy

<h2>배송조회</h2>
<form name='my_form' method='post' onsubmit='return validateForm()'>
운송장번호: <input type='text' name='invoice_number' />
<button>조회</button>
</form>

<script>
function validateForm() {
    var invoice_number = document.forms['my_form']["invoice_number"].value;
    if ( invoice_number == null || invoice_number == "") {
        alert("운송장번호를 입력해주세요.");
        return false;
    }
}
</script>

3 같이 보기

• HTML form 태그

4 참고

• http://www.w3schools.com/js/js_validation.asp