Form validation error in JavaScript [closed]

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Form validation error in JavaScript [closed]

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#1 by (0 votes)

6

I'm having a validation error, when I hit the input of submit button it does not test the function of JavaScript and it goes right where action is going to go.

<HTML>
<HEAD>
<TITLE>Cadastro</title>
<script language="JavaScript">
    function validaFormCadastro() {           
        d = document.form_cadastro;                      
        if (d.NOME.value == "") {                     
            alert("O campo NOME deve ser preenchido!");                    
            d.NOME.focus();                     
            return false;           
        }
        if (d.NOMEUSUARIO.value == "") {                     
            alert("O campo NOME DE USUARIO deve ser preenchido!");                    
            d.NOMEUSUARIO.focus();                     
            return false;           
        }           
        if (d.RM.value == "") {                     
            alert("O campo RM deve ser preenchido!");                    
            d.RM.focus();                     
            return false;           
        }
        if (d.SENHA.value == "") {                     
            alert("O campo SENHA deve ser preenchido!");                    
            d.SENHA.focus();                     
            return false;           
        }
    }
</script>
</head>
<body>
<form name="form_cadastro" action="salvar_aluno.php" method="get">
    <table border='1'>
        <tr>
            <td>
                <label>Nome completo</label>
            </td>
            <td>
                <input type="text" name="NOME">
                <br>
            </td>
        </tr>
        <tr>
            <td>
                <label>Nome de Usuario</label>
            </td>
            <td>
                <input type="text" name="NOMEUSUARIO">
                <br>
            </td>
        </tr>
        <tr>
            <td>
                <label>RM</label>
            </td>
            <td>
                <input type="text" name="RM">
                <br>
            </td>
        </tr>
        <tr>
            <td>
                <label>SENHA</label>
            </td>
            <td>
                <input type="password" name="SENHA">
                <br>
            </td>
        </tr>
    </table>
    <p>
        <input type="submit" name="botao_comando" value="CADASTRAR" onclick="return validaFormCadastro()">
</form>
</body>
</html>

javascript

asked by anonymous 29.11.2015 / 02:23

1 answer

String manipulation - split () dynamic url url

score 0 · Answer 1

The solution is to call the method validaFormCadastro() you add event.preventDefault(); to return the original state. Try this:

    <!-- no seu input, mande como parametro o contexto do seu botao -->
    <input type="submit" name="botao_comando" value="CADASTRAR" onclick="validaFormCadastro(this)">

    <script>
    function validaFormCadastro(event) {   
        //metodo para voltar ao estado original (vai ignorar onsubmit da funcao)
        event.preventDefault();  

        d = document.form_cadastro;                      
        if (d.NOME.value == "") {                     
            alert("O campo NOME deve ser preenchido!");                    
            d.NOME.focus();                     
            return false;           
        }
        if (d.NOMEUSUARIO.value == "") {                     
            alert("O campo NOME DE USUARIO deve ser preenchido!");                    
            d.NOMEUSUARIO.focus();                     
            return false;           
        }           
        if (d.RM.value == "") {                     
            alert("O campo RM deve ser preenchido!");                    
            d.RM.focus();                     
            return false;           
        }
        if (d.SENHA.value == "") {                     
            alert("O campo SENHA deve ser preenchido!");                    
            d.SENHA.focus();                     
            return false;           
        }
    }
</script>