Question

Following code working:

function()
    {
    var Marker = new google.maps.Marker();
    var MarkerOptions = {};
    MarkerOptions.map = my_map;
    MarkerOptions.position = new google.maps.LatLng(0,0);
    MarkerOptions.animation = google.maps.Animation.DROP;
    MarkerOptions.clickable = true;
    MarkerOptions.cursor = 'pointer';

    Marker.smallicon = [{
        anchor:null,
        origin:null,
        scaledSize:null,
        size:new google.maps.Size(20,32),
        url:'http://maps.gstatic.com/mapfiles/markers2/marker_sprite.png'
        }];

    Marker.setOptions(MarkerOptions);
    }

And after add this one line, console shooting full of errors

function()
    {
    var Marker = new google.maps.Marker();
    var MarkerOptions = {};
    MarkerOptions.map = way_map;
    MarkerOptions.position = new google.maps.LatLng(0,0);
    MarkerOptions.animation = google.maps.Animation.DROP;
    MarkerOptions.clickable = true;
    MarkerOptions.cursor = 'pointer';

    Marker.smallicon = [{
        anchor:null,
        origin:null,
        scaledSize:null,
        size:new google.maps.Size(20,32),
        url:'http://maps.gstatic.com/mapfiles/markers2/marker_sprite.png'
        }];

    Marker.setIcon(Marker.smallicon);
    Marker.setOptions(MarkerOptions);
    }

I don’t understand it more, it working with google.maps.MarkerImage but in reference is written

A structure representing a Marker icon or shadow image. This class is
deprecated in favor of Icon.

So i try to work with Icon, they have changed it from constructor to Object so was changed the model of calling.

Answer 1

Marker.smallicon currently is an array, not a google.maps.Icon

use either:

Marker.setIcon(Marker.smallicon[0]);

or let it be an object:

Marker.smallicon = {
        size:new google.maps.Size(20,32),
        url:'http://maps.gstatic.com/mapfiles/markers2/marker_sprite.png'
        };

Note: you don’t need to set all options of a google.maps.Icon, ommit the options that you dont want to set.