How to get my insert.php url in jquery?

I want to save my form data via jquery but i can’t able to access it in my script.Can anyone help me.
URL access in script: url: ‘admin.php?page=insert.php’,

My script

$(function () {
        $('form').on('submit', function (e) {
          e.preventDefault();
          var schema_key = $("#schema_key").val(); 
          $.ajax({
            type: 'post',
            url: 'admin.php?page=insert.php',
            data: schema_key,
            success: function () {
              alert('form was submitted');
            }
          });

        });

      });