JavaScript 基础表单验证示例(纯Js实现)
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; }
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