check if form bootstrap is valid js

1<script>
2          // Example starter JavaScript for disabling form submissions if there are invalid fields
3          (function() {
4            'use strict';
5            window.addEventListener('load', function() {
6              // Fetch all the forms we want to apply custom Bootstrap validation styles to
7              var forms = document.getElementsByClassName('needs-validation');
8              // Loop over them and prevent submission
9              var validation = Array.prototype.filter.call(forms, function(form) {
10                form.addEventListener('submit', function(event) {
11                  if (form.checkValidity() === false) {
12                    event.preventDefault();
13                    event.stopPropagation();
14                  }
15                  form.classList.add('was-validated');
16                }, false);
17              });
18            }, false);
19          })();
20          </script>

1function form_validate(attr_id){
2    var result = true;
3    $('#'+attr_id).validator('validate');
4    $('#'+attr_id+' .form-group').each(function(){
5        if($(this).hasClass('has-error')){
6            result = false;
7            return false;
8        }
9    });
10    return result;
11}
12