var map, marker;

function addExtMarker() {
		var point = new GPoint(-89.397791, 43.074125);
		var marker = new GMarker(point);
		map.addOverlay(marker);
		GEvent.addListener(marker, 'click', function() {
			marker.openInfoWindowHtml("<strong>University of Wisconsin-Extension</strong><br />432 N. Lake St.,<br />Madison, WI 53716");
	      });
	}

onload = function() {
	
	map = new GMap(document.getElementById("map"));
	map.addControl(new GSmallMapControl());
	map.disableDragging();
	
	// coordinates, in degrees, from google earth
	map.centerAndZoom(new GPoint(-89.397791, 43.074125), 2);
	
	addExtMarker();
}

function plotParking(point) {
	
	var marker = new GMarker(point);
	map.addOverlay(marker);
	
	return false;
}

function plotLakeSt(){
	// Lake St. Ramp
	return plotParking(new GPoint(-89.397193, 43.074056));
}
function plotHCW(){
	// Helen C White
	return plotParking(new GPoint(-89.401608, 43.076622));
}

function plotMem(){
	// Memorial Union
	return plotParking(new GPoint(-89.399120, 43.076233));
}
function plotSER(){	
	// SouthEast Ramp
	return plotParking(new GPoint(-89.397887, 43.072837));
}
function plotGrainger(){	
	return plotParking(new GPoint(-89.402115, 43.072720));
}
function plotPeterson(){	
	return plotParking(new GPoint(-89.398779, 43.074288));
}