本文实例为大家分享了js表单验证的实现方法，供大家参考，具体内容如下
第一种：js表单验证
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>注册-个人用户</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <script src="//cdn.bootcss.com/jquery/3.0.0-beta1/jquery.js"></script> <style> body { font-family: Arial, "宋体", Lucida, Verdana, Helvetica, sans-serif; font-size: 12px; color: #333; line-height: 150%; background: #f2f2f2; } .hide{display:none;} .focus,.error { color: #e4393c; line-height: 36px; height: 36px; position: absolute; top: 0px; width: 260px; padding: 0 5px; background: #FFEBEB; border: 1px solid #ffbdbe; } .error span,.focus span { padding: 5px 0; line-height: 13px; display: block; } .focus { color: #666; width: 260px;; line-height: 36px; background: #f7f7f7; border: 1px solid #dddddd; } .regist { width: 990px; padding: 0; margin: 0 auto; zoom: 1; } .mc { padding: 30px 0 20px; border: solid #dddddd; border-width : 0px 1px 1px; background: #FFF; overflow: hidden; zoom: 1; border-width: 0px 1px 1px; } .form { float: left; width: 750px; font-size: 12px; } .form label,.form input,.form select,.form textarea,.form button,.form .label { float: left; font-size: 12px; } .item { padding-top: 9px; height: 60px; line-height: 34px; position: relative; z-index: 1; } .label { float: left; width: 190px; text-align: right; font-size: 14px; color: #999; padding-right: 10px; } .input { float: left; position: relative; width: 270px; overflow: visible; } .text { float: none; width: 275px; height: 37px; line-height: 32px; border: 1px solid #cccccc; font-size: 14px; font-family: arial, "宋体"; overflow: hidden; } </style></head><body> <div class="regist"> <div class="mc"> <form id="personRegForm" class="form" action="login.html" method="POST" onsubmit="return validateForm();"> <div class="item"> <span class="label">用户名：</span> <div class="input"> <input type="text" id="username" name="username" class="text"> <label id="username_msg" class="hide"></label> </div> </div> <div class="item"> <span class="label">请设置密码：</span> <div class="input"> <input type="password" id="password" name="password" class="text"> <label id="pwd_msg" class="hide"></label> </div> </div> <div class="item"> <span class="label">请确认密码：</span> <div class="input"> <input type="password" id="pwdRepeat" name="pwdRepeat" class="text"> <label id="pwdRepeat_msg" class="hide"></label> </div> </div> <div class="item"> <span class="label">验证邮箱：</span> <div class="input"> <input type="text" id="mail" name="mail" class="text"> <label id="mail_msg" class="hide"></label> </div> </div> <div class="item"> <span class="label"> </span> <input type="submit" class="btn-img" id="registsubmit" value="立即注册" /> </div> </form> </div> </div> <script> window.onload = function(){ // 1. 用户名 $("#username").focus(function(){ /* 获取焦点 var username_msg = $("#username_msg"); username_msg.text("4-20位字符，支持英文、数字及'-'、'_'组合"); username_msg.attr("class","focus"); */ elemFocus("username_msg","4-20位字符，支持英文、数字及'-'、'_'组合"); }).blur(userValidator); // 2. 密码 $("#password").focus(function(){ elemFocus("pwd_msg","6-20位字符，可使用字母、数字的组合"); }).blur(pwdValidator); // 3. 确认密码 $("#pwdRepeat").focus(function(){ elemFocus("pwdRepeat_msg","6-20位字符，可使用字母、数字的组合"); }).blur(pwdRepeatValidator); // 4. Email $("#mail").focus(function(){ elemFocus("mail_msg","完成验证后，可以使用该邮箱登录和找回密码"); }).blur(emailValidator); } // 定义函数 - 通用的信息提示 function elemFocus(eleId,text){ var ele_msg = $("#"+eleId); ele_msg.text(text); ele_msg.attr("class","focus"); } // 定义验证用户名的函数 function userValidator(){ // 获取用户名输入的值 var value = $("#username").val(); // 获取用于显示提示信息的元素 var username_msg = $("#username_msg"); // 验证逻辑 if(value==""||value==null){ username_msg.text("用户名不能为空"); username_msg.attr("class","error"); return false; }else if(value.length<4||value.length>20){ username_msg.text("用户名的长度不正确"); username_msg.attr("class","error"); return false; }else if(!/^[a-zA-Z0-9-_]{4,20}$/.test(value)){ username_msg.text("用户名输入不正确"); username_msg.attr("class","error"); return false; } // 验证通过修改正确样式 if(!username_msg.hasClass("hide")){ username_msg.text(""); username_msg.attr("class","hide"); } return true; } // 定义验证密码的函数 function pwdValidator(){ var value = $("#password").val(); var pwd_msg = $("#pwd_msg"); if(value==""||value==null){ pwd_msg.text("密码不能为空"); pwd_msg.attr("class","error"); return false; }else if(value.length<6||value.length>20){ pwd_msg.text("密码的长度不正确"); pwd_msg.attr("class","error"); return false; }else if(!/^[a-zA-Z0-9]{6,20}$/.test(value)){ pwd_msg.text("密码输入不正确"); pwd_msg.attr("class","error"); return false; } if(!pwd_msg.hasClass("hide")){ pwd_msg.text(""); pwd_msg.attr("class","hide"); } return true; } // 定义确认密码验证的函数 function pwdRepeatValidator(){ var value = $("#pwdRepeat").val(); var pwdRepeat_msg = $("#pwdRepeat_msg"); var pwd = $("#password").val(); if(value==""||value==null){ pwdRepeat_msg.text("密码不能为空"); pwdRepeat_msg.attr("class","error"); return false; }else if(value.length<6||value.length>20){ pwdRepeat_msg.text("密码的长度不正确"); pwdRepeat_msg.attr("class","error"); return false; }else if(!/^[a-zA-Z0-9]{6,20}$/.test(value)){ pwdRepeat_msg.text("密码输入不正确"); pwdRepeat_msg.attr("class","error"); return false; }else if(value != pwd){ pwdRepeat_msg.text("两次密码输入不一致"); pwdRepeat_msg.attr("class","error"); return false; } if(!pwdRepeat_msg.hasClass("hide")){ pwdRepeat_msg.text(""); pwdRepeat_msg.attr("class","hide"); } return true; } // 定义Email验证的函数 function emailValidator(){ var value = $("#mail").val(); var email_msg = $("#mail_msg"); if(value==""||value==null){ email_msg.text("Email不能为空"); email_msg.attr("class","error"); return false; }else if(!/^/w+([-+.]/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*$/.test(value)){ email_msg.text("Email格式不正确"); email_msg.attr("class","error"); return false; } if(!email_msg.hasClass("hide")){ email_msg.text(""); email_msg.attr("class","hide"); } return true; } function validateForm(){ if(!userValidator()||!pwdValidator()||!pwdRepeatValidator()||!emailValidator()){ return false; } return true; } </script></body></html>第二种：
<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title></title> <style> * { padding: 0; margin: 0; } form { width: 570px; height: 300px; margin: 100px auto; } label { width: 64px; float: left; clear: left; height: 36px; line-height: 36px; margin-top: 10px; } input { width: 300px; height: 36px; line-height: 36px; margin-top: 10px; text-indent: 8px; font-size: 16px; font-family: "微软雅黑"; border: 1px solid #ccc; float: left; } #sub { width: 302px; height: 40px; border: 1px solid #ccc; background: #888; color: #fff; font-size: 18px; text-indent: 0; } .spa { height: 36px; line-height: 36px; width: 204px; display: inline-block; float: left; font-size: 12px; color: #BD362F; text-indent: 10px; margin-top: 10px; } </style> </head> <body> <form action="" method="post"> <label id="name">姓 名：</label><input type="text" name="username" id="username" value="" placeholder="请输入姓名" /><span class="spa spa1"></span><br /> <label id="phone">手机号：</label><input type="text" name="userphone" id="userphone" value="" placeholder="请输入手机号" /><span class="spa spa2"></span><br /> <label id="address">地 址：</label><input type="text" name="useraddress" id="useraddress" value="" placeholder="请输入地址" /><span class="spa spa3"></span><br /> <label> </label><input type="submit" value="注册" id="sub" /> </form> <script src="http://code.jquery.com/jquery-1.4.1.js"></script> <script type="text/javascript"> window.onload = function() { $("#username").focus() } /************************ 失焦判断 **********************************/ $("input").blur(function() { $(".spa").css("color", "#BD362F") if($(this).is("#username")) { //姓名判断 var na = /^[/u4E00-/u9FA5]{2,4}$/ if($("#username").val() != "") { if(!(na.test($("#username").val()))) { $(".spa1").text("请输入2-4个汉字"); $(this).css("border", "1px solid #BD362F") return false; } else if(na) { $(".spa1").text(""); return true; } } else { $(".spa1").text(""); } } if($(this).is("#userphone")) { //手机号判断 var ph = /^1[3|5|7|8|][0-9]{9}$/ if($("#userphone").val() != "") { if(!(ph.test($("#userphone").val()))) { $(".spa2").text("请输入正确手机号"); $(this).css("border", "1px solid #BD362F") return false; } else if(ph) { $(".spa2").text(""); return true; } } else { $(".spa2").text(""); } } if($(this).is("#useraddress")) { //地址判断 var ad = /^(?=.*?[/u4E00-/u9FA5])[/dA-Za-z/u4E00-/u9FA5]{8,32}/; if($("#useraddress").val() != "") { if(!(ad.test($("#useraddress").val()))) { $(".spa3").text("请输入正确地址"); $(this).css("border", "1px solid #BD362F") return false; } else if(ad) { $(".spa3").text(""); return true; } } else { $(".spa3").text(""); } } }) /********************** 聚焦提示 ************************/ $("input").focus(function() { if($(this).is("#username")) { $(".spa1").text("四个汉字").css("color", "#aaa") $(this).css("border", "1px solid #aaa") } if($(this).is("#userphone")) { $(".spa2").text("11位手机号码").css("color", "#aaa") $(this).css("border", "1px solid #aaa") } if($(this).is("#useraddress")) { $(".spa3").text("最少8个字符（汉字、字母和数字）").css("color", "#aaa") $(this).css("border", "1px solid #aaa") } }) /*********************** 提交验证 ***************************/ $("#sub").click(function() { var na = /^[/u4E00-/u9FA5]{2,4}$/; //姓名正则 var ph = /^1[3|5|7|8|][0-9]{9}$/; //手机号正则 var ad = /^(?=.*?[/u4E00-/u9FA5])[/dA-Za-z/u4E00-/u9FA5]{8,32}/; //地址正则 if(na.test($("#username").val()) && ph.test($("#userphone").val()) && ad.test($("#useraddress").val())) { return true; } else { if($("#username").val() == "") { $(".spa1").text('请你填写用户名') } if($("#userphone").val() == "") { $(".spa2").text('请你填写手机号') } if($("#useraddress").val() == "") { $(".spa3").text('请你填写地址') } return false; } }) </script> </body></html>以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。
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