Implement form validation based on Jquery

Implement form validation based on Jquery_jquery

WBOY

Release： 2016-05-16 15:47:31

Original

1240 people have browsed it

Sometimes when we register an account and log in to the system, we can only submit when all verifications are passed. This requires Jquery to implement form verification. Today I will share with you a piece of code to implement form verification based on Jquery.

<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8">
    <title>Reg</title>
    <style>
      .state1{
        color:#aaa;
      }
      .state2{
        color:#000;
      }
      .state3{
        color:red;
      }
      .state4{
        color:green;
      }
    </style>
    <script src="jquery.js"></script>
    <script>
      $(function(){
 
        var ok1=false;
        var ok2=false;
        var ok3=false;
        var ok4=false;
        // 验证用户名
        $('input[name="username"]').focus(function(){
          $(this).next().text('用户名应该为3-20位之间').removeClass('state1').addClass('state2');
        }).blur(function(){
          if($(this).val().length >= 3 && $(this).val().length <=12 && $(this).val()!=''){
            $(this).next().text('输入成功').removeClass('state1').addClass('state4');
            ok1=true;
          }else{
            $(this).next().text('用户名应该为3-20位之间').removeClass('state1').addClass('state3');
          }
           
        });
 
        //验证密码
        $('input[name="password"]').focus(function(){
          $(this).next().text('密码应该为6-20位之间').removeClass('state1').addClass('state2');
        }).blur(function(){
          if($(this).val().length >= 6 && $(this).val().length <=20 && $(this).val()!=''){
            $(this).next().text('输入成功').removeClass('state1').addClass('state4');
            ok2=true;
          }else{
            $(this).next().text('密码应该为6-20位之间').removeClass('state1').addClass('state3');
          }
           
        });
 
        //验证确认密码
          $('input[name="repass"]').focus(function(){
          $(this).next().text('输入的确认密码要和上面的密码一致,规则也要相同').removeClass('state1').addClass('state2');
        }).blur(function(){
          if($(this).val().length >= 6 && $(this).val().length <=20 && $(this).val()!='' && $(this).val() == $('input[name="password"]').val()){
            $(this).next().text('输入成功').removeClass('state1').addClass('state4');
            ok3=true;
          }else{
            $(this).next().text('输入的确认密码要和上面的密码一致,规则也要相同').removeClass('state1').addClass('state3');
          }
           
        });
 
        //验证邮箱
        $('input[name="email"]').focus(function(){
          $(this).next().text('请输入正确的EMAIL格式').removeClass('state1').addClass('state2');
        }).blur(function(){
          if($(this).val().search(/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/)==-1){
            $(this).next().text('请输入正确的EMAIL格式').removeClass('state1').addClass('state3');
          }else{         
            $(this).next().text('输入成功').removeClass('state1').addClass('state4');
            ok4=true;
          }
           
        });
 
        //提交按钮,所有验证通过方可提交
 
        $('.submit').click(function(){
          if(ok1 && ok2 && ok3 && ok4){
            $('form').submit();
          }else{
            return false;
          }
        });
         
      });
    </script>
  </head>
<body>
 
<form action='do.php' method='post' >
  用 户 名:<input type="text" name="username">
        <span class='state1'>请输入用户名</span><br/><br/>
  密　　码:<input type="password" name="password">
        <span class='state1'>请输入密码</span><br/><br/>
  确认密码:<input type="password" name="repass">
        <span class='state1'>请输入确认密码</span><br/><br/>
  邮　　箱:<input type="text" name="email">
        <span class='state1'>请输入邮箱</span><br/><br/> 
  <a href="javascript:;"><img class='submit' type='image' src='./images/reg.gif' /></a>
</form>
</body>
</html>

Copy after login

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