members: make email field not required for emergency contacts in forms

jdav_web/members/templates/members/member_form.html

@@ -47,7 +47,9 @@
   function addRequired(element) {
     var inputs = element.getElementsByTagName('input');
     for (var i = 0; i < inputs.length; i++) {
-      inputs[i].setAttribute('required', 'required');
+      if (inputs[i].getAttribute('type') != 'email') {
+          inputs[i].setAttribute('required', 'required');
+      }
     }
   }
   function removeRequired(element) {

jdav_web/members/views.py

@@ -72,7 +72,7 @@ class EmergencyContactForm(ModelForm):
     class Meta:
         model = EmergencyContact
         fields = ['prename', 'lastname', 'email', 'phone_number']
-        required = ['prename', 'lastname', 'email', 'phone_number']
+        required = ['prename', 'lastname', 'phone_number']
 
 
 class BaseEmergencyContactsFormSet(BaseInlineFormSet):