1、oninvali事件通过setCustomValidity方法来自定义提示信息
<form action=""> <label> 数字: <input type="text" pattern="^\d{11}$" oninvalid="setCustomValidity(‘请输入11位数字‘)"> </label> <input type="submit"> </form>
2、onsubmit事件自定义提示信息
<!DOCTYPE HTML> <head> <meta charset="UTF-8"> <title>Html5页面使用javascript验证表单判断输入</title> <script language="javascript"> function check(){ var pass1=document.getElementbyid("pass1"); var pass2=document.getElementbyid("pass2"); if (pass1.value!=pass2.value){ pass2.setCustomvalidity("密码不一致"); else pass2.setCustomvalidity(""); } var email=document.getElementbyid("email"); if (!email.checkValidity()) email.setCustomvalidity("请输入正确的email地址"); } </script> </head> <form id="testForm" onsubmit="return check()"> 密码:<input type="password" name="pass1" id="pass1" /><br/> 确认密码:<input type="password" name="pass2" id="pass2" /><br/> Email:<input type="email" name="email" id="email" /><br/> <input type="submit" /> </form>
<form action=""> <label> 数字: <input type="text" pattern="^\d{11}$" oninvalid="setCustomValidity(‘请输入11位数字‘)"> </label> <input type="submit"> </form>
原文：http://www.cnblogs.com/lyd2016/p/7231141.html