Arroba (@) Obrigatória No Formulário. Como Fazer ?
#1
Posted 16/07/2006, 12:06
Alguém pode me dizer como faço pra num campo de formulário ser obrigatório o uso da "@" (arroba), retornando um erro em javascript caso não seja usada ?
Obrigado.
#2
Posted 16/07/2006, 12:39
function validaFormContato(){
//nome do Form de envio
d = document.contato;
//validar nome
if (d.Nome.value == ""){
alert("O campo " + d.Nome.name + " deve ser preenchido!");
d.Nome.focus();
return false;
}
//validar telefone
if (d.Telefone.value == ""){
alert ("O campo " + d.Telefone.name + " deve ser preenchido!");
d.Telefone.focus();
return false;
}
//validar email
if (d.Email.value == ""){
alert("O campo " + d.Email.name + " deve ser preenchido!");
d.Email.focus();
return false;
}
//validar email(verificao de endereco eletrônico)
parte1 = d.Email.value.indexOf("@");
parte2 = d.Email.value.indexOf(".");
parte3 = d.Email.value.length;
if (!(parte1 >= 3 && parte2 >= 6 && parte3 >= 9)) {
alert ("O campo " + d.Email.name + " deve conter um endereco eletronico! Ex: seunome@seuprovedor.com.br");
d.Email.focus();
return false;
}
//validar assunto
if (d.Assunto.value == ""){
alert("O campo " + d.Assunto.name + " deve ser preenchido!");
d.Assunto.focus();
return false;
}
//validar Mensagem
if (d.Mensagem.value == ""){
alert("O campo " + d.Mensagem.name + " deve ser preenchido!");
d.Mensagem.focus();
return false;
}
return true;
}
Com scrit acima crie um arquivo .js e depois faz a chamada na sua pagina, assim:
<script type="text/javascript" language="javascript" src="validaform.js"></script>
ai vc chama no no seu form assim:
<form action="pagina.html" method="POST" name="contato" onSubmit="return validaFormContato()">
falow t+
#3
Posted 16/07/2006, 13:26
Thiago, seu script é perfeito e funcional, porém, acho que para esse caso de somente validar um campo de email deve ser feito de uma forma menos complexa.
<script>
function validaemail() {
if (document.getElementById('email').value == ""){
alert("O campo de e-mail deve ser preenchido.");
document.getElementById('email').focus();
return false;
}
else {
arroba = document.getElementById('email').value.indexOf("@");
ponto = document.getElementById('email').value.indexOf(".");
tamanho = document.getElementById('email').value.length;
if (!(arroba >= 2 && ponto >= 3 && tamanho >= 9)) {
alert ("Digite um e-mail válido.\n Exemplo: seunome@seuprovedor.com.br");
document.getElementById('email').focus();
return false;
}
else {
return true;
}
}
}
</script>
<form name="vai" action="pagina.extensão" onsubmit="return validaemail();">
<input type="text" size="20" id="email" />
<input type="submit" value="Validar">
</form>
Entende?
Sem querer ofender, OK? Somente ajudando.
Bom, agradeço sua atenção e compreensão.
Até mais, pessoas.
Fui.
Edição feita por: invasoesdemaniacos, 16/07/2006, 13:29.
Localidade: Campinas - SP
Linguagem de desenvolvimento: XHTML | CSS (Tableless) | JavaScript | AJAX | PHP
Contatos: brkamikasecps@gmail.com | brkamikasecps@hotmail.com
#4
Posted 16/07/2006, 14:47
sua validação está legal mas, ela barra um e-mail válido do tipo:
a.silva@uol.com.br
Que tal tentar com expressões regulares?
#5
Posted 16/07/2006, 16:04
Verdade...
Desafio lançado, não?
Ok, segue mais enxuto ainda:
<script> function validaemail() { var email = document.getElementById('email'); if (email.value == ""){ alert("O campo de e-mail deve ser preenchido."); email.focus(); return false; } else { var valor = email.value; padrao = /^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$/; OK = padrao.exec(valor); if (!OK) { alert ("Digite um e-mail válido.\n Exemplo: seunome@seuprovedor.com.br"); document.getElementById('email').focus(); return false; } else { return true; } } } </script> <form name="vai" action="pagina.extensão" onsubmit="return validaemail();"> <input type="text" size="20" id="email" /> <input type="submit" value="Validar"> </form>
Falow. Valeu Klaus.
Bem complicadinho ER.
Fui.
Localidade: Campinas - SP
Linguagem de desenvolvimento: XHTML | CSS (Tableless) | JavaScript | AJAX | PHP
Contatos: brkamikasecps@gmail.com | brkamikasecps@hotmail.com
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