JavaScript表單驗證的兩種實作方法-js教程-PHP中文網

首頁

web前端

js教程

JavaScript表單驗證的兩種實作方法

高洛峰

Feb 15, 2017 pm 05:54 PM

js 表單驗證

本文實例為大家分享了js表單驗證的實作方法，供大家參考，具體內容如下

第一種：js表單驗證

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

<!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>
  <p class="regist"> 
    <p class="mc">
      <form id="personRegForm" class="form" action="login.html" method="POST" onsubmit="return validateForm();">
        <p class="item">
          <span class="label">用户名：</span>
          <p class="input">
            <input type="text" id="username" name="username" class="text">
 
            <label id="username_msg" class="hide"></label>
          </p>
        </p>
        <p class="item">
          <span class="label">请设置密码：</span>
          <p class="input">
            <input type="password" id="password" name="password" class="text">
 
            <label id="pwd_msg" class="hide"></label>
          </p>
        </p>
        <p class="item">
          <span class="label">请确认密码：</span>
          <p class="input">
            <input type="password" id="pwdRepeat" name="pwdRepeat" class="text">
 
            <label id="pwdRepeat_msg" class="hide"></label>
          </p>
        </p>
        <p class="item">
          <span class="label">验证邮箱：</span>
          <p class="input">
            <input type="text" id="mail" name="mail" class="text">
 
            <label id="mail_msg" class="hide"></label>
          </p>
        </p>
        <p class="item">
          <span class="label"> </span>
          <input type="submit" class="btn-img" id="registsubmit" value="立即注册" />
        </p>
      </form>
    </p>  
  </p>
 
 
   <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&#39;-&#39;、&#39;_&#39;组合");
        username_msg.attr("class","focus");
        */
        elemFocus("username_msg","4-20位字符，支持英文、数字及&#39;-&#39;、&#39;_&#39;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>

登入後複製

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

<!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() == "") {
            $(".spa1").text(&#39;请你填写用户名&#39;)
          }
          if($("#userphone").val() == "") {
            $(".spa2").text(&#39;请你填写手机号&#39;)
          }
          if($("#useraddress").val() == "") {
            $(".spa3").text(&#39;请你填写地址&#39;)
          }
          return false;
        }
      })
    </script>
  </body>
</html>