<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link rel='stylesheet' href='https://use.fontawesome.com/releases/v5.5.0/css/all.css' integrity='sha384-B4dIYHKNBt8Bc12p+WXckhzcICo0wtJAoU8YZTY5qE0Id1GSseTk6S+L3BlXeVIU' crossorigin='anonymous'> <div class=""> <div class="container d-flex justify-content-center"> <div class="row"> <div class="card"> <div class="card-header"> <strong>Login</strong> </div> <div class="card-body"> <form name="login" id="login"> <div class="row"> <div class="col"> <span class="profile-img"> <i class='fas fa-user-circle' style='font-size:120px'></i> </span> </div> </div> <div class="row"> <div class="col"> <hr> <!-- other content --> </div> </div> <div class="row"> <div class="col"> <div class="form-group"> <div class="input-group mb-3"> <div class="input-group-prepend"> <span class="input-group-text" id="basic-addon1"> <i class='fas fa-user-shield'></i> </span> </div> <input class="form-control" placeholder="Email" id="loginEmail" name="loginEmail" type="email" autofocus> </div> </div> <div class="form-group"> <div class="input-group mb-3"> <div class="input-group-prepend"> <span class="input-group-text" id="basic-addon1"> <i class='fas fa-user-secret'></i> </span> </div> <input class="form-control" placeholder="Password" id="loginPassword" name="loginPassword" type="password"> </div> </div> <div class="form-group"> <input type="button" class="btn btn-lg btn-success btn-block submit" id="login_m" value="Sign in" disabled> </div> </div> </div> <!-- <a href="#" onClick="">I forgot my password!</a> --> </form> </div> </div> </div> </div> </div>

body { background-color: #F9F9F9; } .container{ margin-top: 5%; } .card-header { padding: 5px 15px; } .profile-img { width: 96px; height: 96px; margin: 0 auto 10px; display: block; -moz-border-radius: 50%; -webkit-border-radius: 50%; border-radius: 50%; }

$(function() { checkLogin("#login"); }); //validaciones var emailPattern = "^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+.[a-zA-Z]{2,4}$"; function checkInput(idInput, pattern) { return $(idInput).val().match(pattern) ? true : false; } function checkLongInput(idInput){ return $(idInput).val().length >= 5 ? true : false; } function enableSubmit (idForm) { $(idForm + " input.submit").removeAttr("disabled"); } function disableSubmit (idForm) { $(idForm + " input.submit").attr("disabled", "disabled"); } function checkLogin(idForm){ $(idForm + " *").on("change keydown", function() { if (checkInput("#loginEmail", emailPattern) && checkLongInput("#loginPassword")) { enableSubmit(idForm); } else { disableSubmit(idForm); } }); }