<style>.oneline { line-height: 1.5; margin: 10px auto;}.oneline label { width: 100px; text-indent: 15px; font-size: 14px; font-family: "Microsoft Yahei"; display: inline-block;}.oneline .sinput { width: 60%; height: 30px; border-radius: 6px; border: 1px solid #e2e2e2;}.oneline input[type="submit"] { margin-left: 20px; width: 80px; height: 30px; border: 0; background-color: #5899d0; color: #fff; font-size: 14px; border-radius: 6px;}.error-messages { color: red;}</style><body> <form id="forms"> <div class="oneline"> <label for="name">用户名:</label> <input id="name" class="sinput" name="name" type="text" required> </div> <div class="oneline"> <label for="email">Email:</label> <input id="email" class="sinput" name="email" type="email" required> </div> <div class="oneline"> <input type="submit" id="submits" value="提交"> </div> </form> <script> function replaceValidationUI(form) { form.addEventListener("invalid", function(event) { event.preventDefault(); }, true); form.addEventListener("submit", function(event) { if (!this.checkValidity()) { event.preventDefault(); } },true); //此处写代码 var submits = document.getElementById('submits'), label = document.getElementsByTagName('label'); submits.addEventListener('click',function(event){ var fields = form.querySelectorAll(':invalid'), error = form.querySelectorAll('.error-messages'), parent; for(var i = 0;i<error.length;i++){ error[i].parentNode.removeChild(error[i]); }; for(var m = 0;m<label.length;m++){ parent = label[m].parentNode.parentNode; parent.insertAdjacentHTML("afterBegin","<div class='error-messages'><ul><li>"+label[m].innerText+fields[m].validationMessage+"</li></ul></div>"); }; if (fields.length > 0) { fields[0].focus(); }; },true) } var forms = document.getElementById("forms"); replaceValidationUI(forms); </script></body>谁能告诉我，如何取与 fields[m].validationMessage 相邻元素label.innerhtml的值； 想不通，弄了 一下午，是不是脑子不好使。。。 还是不需要取这个label值？
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