Tutorial borang pengesahan pembangunan JS - borang pengesahan (5)

Kami juga bercakap tentang pengesahan medan teks sebelum ini

Dalam bahagian sebelumnya kita bercakap tentang bagaimana pengesahan nama pengguna, kata laluan dan e-mel dicetuskan dengan mengklik butang pendaftaran

Saya menggunakan kaedah yang berbeza di bawah. Sahkan medan teks

Apabila kami memasukkan teks dalam medan teks, apabila terdapat terlalu banyak aksara yang dimasukkan, kami akan memberikan mesej segera. Tidak perlu mengklik butang pendaftaran untuk menggesa

Dengan cara ini kami mengesahkan teks Medan mesti ditulis dalam acara papan kekunci Kod adalah seperti berikut:

document.getElementById('txt').onkeyup=function(){
var leng = document.getElementById('txt'). value.length;
if(leng>20){
document.getElementById("sp3").innerHTML = "Kandungan maksimum melebihi!";
}lain{
document.getElementById(' sp3').innerHTML = " ";
                                                                                                                                                              

Dalam tempoh 20, tiada kod segera yang lengkap

><🎜 :

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title></title>
    <style type="text/css">
        *{margin:0;padding:0;}
        #div{width:410px;height:400px;background:#46a3ff;padding-left:16px;
            padding-top:20px;}
        input{
            outline:none;
            box-sizing:border-box;padding-left:15px;}
        textarea{
            outline:none;resize : none;
            box-sizing:border-box;padding-left:15px;padding-top:5px;}
        .name{width:200px;height:30px;margin-left:8px;border:1px solid #ffc1e0;border-radius:8px;}
        .pwd{width:200px;height:30px;
            margin-left:8px;border:1px solid #ffc1e0;border-radius:8px;}
        .email{width:200px;height:30px;margin-left:8px;border:1px solid #ffc1e0;border-radius:8px;}
        .txt{
            width:280px;height:70px;margin-left:8px;border:1px solid #ffc1e0;border-radius:8px;}
        .sub{width:100px;height:30px;padding-left:0px;
            border:none;
            border-radius:5px;background:#ffd0ff;}
        .sub:hover{background:#ffaad5;}
        .div{
            width:200px;height:30px;margin:0 auto;box-sizing:border-box;padding-left:45px;padding-top:5px;color:#8600ff;font-weight:bold;}

    </style>
</head>
<body>
    <div id="div">
        <form>
            <label>用户名:</label>
            <input type="text" class="name" id="name">
            <div id="sp" class="div"></div>                
            <label>密&nbsp;码:</label>
            <input type="password" class="pwd" id="pwd">
            <div id="sp1" class="div"></div>
            <label>邮&nbsp;箱:</label>
            <input type="text" class="email" id="email">
            <div id="sp2" class="div"></div>
            <label>爱&nbsp;好:</label>
            <textarea rows="5" cols="40" class="txt" id="txt"></textarea>
            <div id="sp3" class="div"></div>
            <input type="button" class="sub" value="注册" id="sub">
        </form>
    </div>

    <script type="text/javascript">
        var sub = document.getElementById('sub');
        sub.onclick=function(){
            //验证用户名是否为空,如果为空,给出提示信息
            var val = document.getElementById('name').value;
            var rel = document.getElementById('name').value.length;
            //console.log(val.length);
            if(val == ""){
                document.getElementById("sp").innerHTML = "用户名不能为空!";
            }else if( rel <= 5 || rel > 10){
                document.getElementById("sp").innerHTML = "格式不正确!";
            }
            //验证密码是否为空,为空则给出提示信息
            var rel = /^[A-Za-z0-9]{6,10}$/;
            var val1 = document.getElementById('pwd').value;
            if(val1 == ""){
                document.getElementById("sp1").innerHTML = "请输入密码!";
            }else if(!rel.test(val1)){
                document.getElementById("sp1").innerHTML = "密码不符合规范!";
            }
            //验证邮箱是否为空和邮箱的格式是否正确
            var reg = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
            var val2 = document.getElementById('email').value;
            if(val2 == ""){
                document.getElementById("sp2").innerHTML = "请输入邮箱!";
            }else if(!reg.test(val2)){
                document.getElementById("sp2").innerHTML = "邮箱格式不正确!";
            }
            //验证内容是否为空
            var val3 = document.getElementById('txt').value;
            if(val3 == ""){
                document.getElementById("sp3").innerHTML = "请输入内容!";
            }
        }

            //当用户名的文本框触发键盘事件,提示信息去除
            document.getElementById('name').onkeyup=function(){
                document.getElementById('sp').innerHTML = " ";
            }
            // //当密码框触发键盘事件,提示信息去除
            document.getElementById('pwd').onkeyup=function(){
                document.getElementById('sp1').innerHTML = " ";
            }
            // //当邮箱文本框触发键盘事件,提示信息去除
            document.getElementById('email').onkeyup=function(){
                document.getElementById('sp2').innerHTML = " ";
            }
            // //当文本域触发键盘事件,提示信息去除
            document.getElementById('txt').onkeyup=function(){
                var leng = document.getElementById('txt').value.length;
                if(leng>20){
                    document.getElementById("sp3").innerHTML = "已超过最大内容!";
                }else{
                    document.getElementById('sp3').innerHTML = " ";
                }
            }            

    </script>
</body>
</html>

Meneruskan pembelajaran
||
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <style type="text/css"> *{margin:0;padding:0;} #div{width:410px;height:400px;background:#46a3ff;padding-left:16px; padding-top:20px;} input{ outline:none; box-sizing:border-box;padding-left:15px;} textarea{ outline:none;resize : none; box-sizing:border-box;padding-left:15px;padding-top:5px;} .name{width:200px;height:30px;margin-left:8px;border:1px solid #ffc1e0;border-radius:8px;} .pwd{width:200px;height:30px; margin-left:8px;border:1px solid #ffc1e0;border-radius:8px;} .email{width:200px;height:30px;margin-left:8px;border:1px solid #ffc1e0;border-radius:8px;} .txt{ width:280px;height:70px;margin-left:8px;border:1px solid #ffc1e0;border-radius:8px;} .sub{width:100px;height:30px;padding-left:0px; border:none; border-radius:5px;background:#ffd0ff;} .sub:hover{background:#ffaad5;} .div{ width:200px;height:30px;margin:0 auto;box-sizing:border-box;padding-left:45px;padding-top:5px;color:#8600ff;font-weight:bold;} </style> </head> <body> <div id="div"> <form> <label>用户名:</label> <input type="text" class="name" id="name"> <div id="sp" class="div"></div> <label>密 码:</label> <input type="password" class="pwd" id="pwd"> <div id="sp1" class="div"></div> <label>邮 箱:</label> <input type="text" class="email" id="email"> <div id="sp2" class="div"></div> <label>爱 好:</label> <textarea rows="5" cols="40" class="txt" id="txt"></textarea> <div id="sp3" class="div"></div> <input type="button" class="sub" value="注册" id="sub"> </form> </div> <script type="text/javascript"> var sub = document.getElementById('sub'); sub.onclick=function(){ //验证用户名是否为空,如果为空,给出提示信息 var val = document.getElementById('name').value; var rel = document.getElementById('name').value.length; //console.log(val.length); if(val == ""){ document.getElementById("sp").innerHTML = "用户名不能为空!"; }else if( rel <= 5 || rel > 10){ document.getElementById("sp").innerHTML = "格式不正确!"; } //验证密码是否为空,为空则给出提示信息 var rel = /^[A-Za-z0-9]{6,10}$/; var val1 = document.getElementById('pwd').value; if(val1 == ""){ document.getElementById("sp1").innerHTML = "请输入密码!"; }else if(!rel.test(val1)){ document.getElementById("sp1").innerHTML = "密码不符合规范!"; } //验证邮箱是否为空和邮箱的格式是否正确 var reg = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/; var val2 = document.getElementById('email').value; if(val2 == ""){ document.getElementById("sp2").innerHTML = "请输入邮箱!"; }else if(!reg.test(val2)){ document.getElementById("sp2").innerHTML = "邮箱格式不正确!"; } //验证内容是否为空 var val3 = document.getElementById('txt').value; if(val3 == ""){ document.getElementById("sp3").innerHTML = "请输入内容!"; } } //当用户名的文本框触发键盘事件,提示信息去除 document.getElementById('name').onkeyup=function(){ document.getElementById('sp').innerHTML = " "; } // //当密码框触发键盘事件,提示信息去除 document.getElementById('pwd').onkeyup=function(){ document.getElementById('sp1').innerHTML = " "; } // //当邮箱文本框触发键盘事件,提示信息去除 document.getElementById('email').onkeyup=function(){ document.getElementById('sp2').innerHTML = " "; } // //当文本域触发键盘事件,提示信息去除 document.getElementById('txt').onkeyup=function(){ var leng = document.getElementById('txt').value.length; if(leng>20){ document.getElementById("sp3").innerHTML = "已超过最大内容!"; }else{ document.getElementById('sp3').innerHTML = " "; } } </script> </body> </html>
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