Center on Zoom

When I click zoom in/out it works but it doesn't center the map on that
coordinate!

function zoomIN(i) {
//Zoom in on the current marker.
map.centerAndZoom(gmarkers[i].point,2);
}

//Zoom-Out Function
function zoomOUT(i) {
//Return to starting point.
map.centerAndZoom(new GPoint(-93.54879638671875, 41.58576547288284),
5);

}

http://www.regencyhomes.com/communities/1.cfm

Help please!