JSFiddle - React, Tailwind, and code Playground

by Deepak Manwal

HTML

<form name="theForm" onsubmit="return ValidateRequiredFields();" method="post" action="../control/Cadastro.php">


Nº do Processo: <br><input type="text" name="nr_processoCA" class="input-xlarge"><br>

<div class="row-fluid" style="text-align:center;">
    <input type="submit" class="btn btn-primary btn-large" value="Gravar">
</div>   

</form>

<script>

function ValidateRequiredFields()
{

var message = new String('\nCampos obrigatórios:\n');
var flag=new Boolean(1);


var x=document.forms["theForm"]["nr_processoCA"].value;
if (x==null || x==""){
    message += '\nNº do processo\n'; 
    flag = new Boolean(0);
}

if (flag == false){
    if(event.preventDefault){
        event.preventDefault();
    }else{
       event.returnValue = false; // for IE as dont support preventDefault;
    }
    alert(message);
}

return flag;

}

</script>