验证思路
监听每个input控件的焦点离开（onblue），当焦点离开时调用验证函数，验证后修改第三栏文字，显示符合/不符合并返回true/false
实现代码：
index.html
<!DOCTYPE html><html><head> <title></title> <pnk rel="stylesheet" href="css.css" rel="external nofollow" ></head><body> <form id="form" action="" method="post" onsubmit="return vipdate()"> <table class="table"> <tr> <td>雇员编号</td> <td> <input type="text" id="empnb" name="empnb" onblur="vapdateEmpnb()"> </td> <td> <span id="empnbMsg"></span> </td> </tr> <tr> <td>雇员姓名</td> <td> <input type="text" id="ename" name="ename" onblur="vapdateEname()"> </td> <td> <span id="enameMsg"></span> </td> </tr> <tr> <td>雇员职位</td> <td> <input type="text" name="epost" id="epost" onblur="vapdateEpost()"> </td> <td> <span id="epostMsg"></span> </td> </tr> <tr> <td>雇员日期</td> <td> <input type="text" name="" id="edate" name="edate" onblur="vapdateEdate()"> </td> <td> <span id="edateMsg"></span> </td> </tr> <tr> <td>基本工资</td> <td> <input type="text" name="esalary" id="esalary" onblur="vapdateEsalary()"> </td> <td> <span id="esalaryMsg"></span> </td> </tr> <tr> <td>佣金</td> <td> <input type="text" name="ebrok" id="ebrok" onblur="vapdateEbrok()"> </td> <td> <span id="ebrokMsg"></span> </td> </tr> <tr> <td colspan="3"> <input type="submit" autofocus="autofocus"> <input type="reset"> </td> </tr> </table> </form></body><script type="text/javascript" src="./FormVapdation.js"></script></html>
FormVapdation.js
// 日期选择function layDate() {}// 验证雇员编号,4位纯数字编号function vapdateEmpnb() { return vapdateRegexp("empnb", /^/d{4}$/);}// 验证雇员姓名,不为空function vapdateEname() { return vapdateNull("ename");}// 验证雇员职位,不为空function vapdateEpost() { return vapdateNull("epost");}// 验证雇员日期function vapdateEdate() { return vapdateRegexp("edate", /^/d{4}-/d{2}-/d{2}$/)}// 验证基本工资function vapdateEsalary() { return vapdateRegexp("esalary", /^/d+(/./d{1,2})?$/)}// 验证佣金function vapdateEbrok() { return vapdateRegexp("ebrok", /^/d+(/./d{1,2})?$/)}// 提交时全部重新验证function vapdate() { return vapdateEmpnb() && vapdateEname() && vapdateEpost() && vapdateEdate() && vapdateEsalary() && vapdateEbrok();}// 正则表达式验证function vapdateRegexp(elemName, regexp) { var elem = document.getElementById(elemName); var msg = document.getElementById(elemName + 'Msg') console.log(regexp); console.log(elem.value); if (regexp.test(elem.value)) { msg.innerHTML = 'ok'; msg.style.color = 'green'; return true; } else { msg.innerHTML = '您的输入不符合规则'; msg.style.color = 'red'; return false; }}// 不为空验证function vapdateNull(elemName) { var elem = document.getElementById(elemName); var msg = document.getElementById(elemName + 'Msg'); console.log(elem.value); console.log(msg); if (elem.value == '' || elem.value == ' ') { msg.innerHTML = '您的输入不能为空'; msg.style.color = 'red'; return false; } else { msg.innerHTML = 'ok'; msg.style.color = 'green'; return true; }}css.css
html { font-size: 14px;}.table { border: 1px grey sopd;}.table tr { height: 2rem;}.table td { width: 15rem;}以上这篇JavaScript 基础表单验证示例(纯Js实现)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持武林网。
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