GM9

In the previous videos, the markers on the map have been added automatically. For each record in the Grid, a corresponding marker has been placed on the Map. However, you can specify that there should be no markers on the map initially. You would do this if you want to add the marker to the map with your own code. This video shows how you can turn off the automatic placement of markers on the map, and then use Action Javascript to add markers to the map programmatically. The video shows a Grid with a list of states. Each row in the Grid has a button to populate the map with the 10 airports in the state with the highest elevation. When you click a button in the grid row, an Ajax callback is made to place the markers on the map.