Combine validators together with formvalidation.io ?

[ScreamerHS]

I'm using a Bootstrap multiselect (https://github.com/davidstutz/bootstrap-multiselect ) which I want to validate on a form (defaultForm) with a formvalidator (The best jQuery validation plugin to validate form fields, support Bootstrap, Foundation, Pure, SemanticUI, UIKit frameworks - FormValidation) .

This example works fine. It revalidate on selecting a option from the multiselect.

'tags[]': {
                   validators: {
                        callback: {
                            message: 'Select one or more options</font>',
                            callback: function(value, validator, $field) {
                                    var options = validator.getFieldElements('tags[]').val();
                                    return (options != null && options.length >= 1 && options.length <= 10);
                            }
                        }
                    }
                },

But I want this to validate when another dropdown menu has selected "Yes". (it has two options as a answer - Yes and No). I also get this thing to work with the following code.

'tags[]': { 
                   validators: { 
                        callback: { 
                            message: 'Select one or more options</font>', 
                            callback: function(value, validator, $field) { 
                                   var x = document.getElementById("data_important"); 
                                   var i = x.selectedIndex; 
                                   return (x.options[i].text == 'No') ? true : (x.options[i].text == ''); 
                            } 
                        } 
                    } 
                },  

So both options works fine, but I can't get them combine together, that the it's going to validate only when another dropdown (data_important) is chosen"Yes" and that it revalidates when selecting a option on the multiselect with name "tags[]".



Is there a fix to combine them together, that both elements works?