23 lines
735 B
JavaScript
23 lines
735 B
JavaScript
document.getElementById('loginForm').addEventListener('submit', function (e) {
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var errorBox = document.getElementById('errorBox');
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var username = document.getElementById('username').value.trim();
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var password = document.getElementById('password').value;
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var errors = [];
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if (!username) {
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errors.push('用户名不能为空');
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}
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if (!password) {
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errors.push('密码不能为空');
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} else if (password.length < 6) {
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errors.push('密码长度至少为 6 位');
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}
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if (errors.length > 0) {
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e.preventDefault();
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errorBox.textContent = errors.join('；');
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errorBox.style.display = 'block';
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} else {
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errorBox.style.display = 'none';
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}
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}); |