how to customize the basic infowindow with tabs displayed using GInfoWindowTab on google map

Question

I have the following function to display the infowindow with tabs on google map using GInfoWindowTab ,the default infowindow is displayed with two tabs ,my question is how can i change the size ,background color and styles of the infowindow and can i add videos into one of the tab in infowindow.

function createMarker(point, name, address, imagepath) {
        var marker = new GMarker(point, gicons[imagepath]);

        var html1 = '<span class="name-tab"><b>' + name + '</b></span> <span class="info"><br/>' + address + '</span>';
        var content = '<img width="100" Height="100" src="http://www.visitingdc.com/images/golden-gate-bridge-picture.jpg" />'; 

        GEvent.addListener(marker, 'click', function() {
        var infoTabs = [new GInfoWindowTab("Address", html1), new GInfoWindowTab("Images", content)];
                 marker.openInfoWindowTabsHtml(infoTabs);
      });