Hi nauna,

Refer below link.

How to add marker based on address and open infoWindow on click on Marker using Google Map API in ASP.Net

nauna says:

$(function () {

        $("[id*=btnSave]").bind("click", function () {

            GetLocation($("#txtAddress").val());

            return false;

        });

    });

Change with below code.

$(function () {
   GetLocation("Your Address");    
});