Can't read form values

1.
<button type="submit" id="btnSave" onclick="save()" class="btn btn-effect"><i class="fa fa-plus-circle" aria-hidden="true"></i> proceed...</button> <- type="button"

2. save_method <- has no value and because of the empty value url is empty too

Sir,

In the save function, the if else condition for save_method is equals to 'add' and there's also a value for the url. Its just I remove this function upon calling the modal for adding method. Originally this CRUD operation is made uing MODAL and I want to create a one-page crud without the modal.

Code:

function add_agency() {
           save_method = 'add';
           $('#agencyForm')[0].reset();
           $('.form-group').removeClass('has-error');
           $('.help-block').empty();
           $('#modal_form').modal('show');
           $('.modal-title').text('Add Agency');
       }

i need the real code. the code you showed to me is wrong.

Code:

var save_method; //for save method string
...
if (save_method == 'add') {
           url = "<?php echo site_url('agency/addAgency')?>";
       } else {
           // url = "<?php echo site_url('agency/update_update')?>";
       }

save_method has not the value of add.