function toggleRef(divName) {
	if (document.getElementById(divName).style.display=='none' ) {
		document.getElementById(divName).style.display='inline';
	} else {
		document.getElementById(divName).style.display='none';
	}	
}



function initialize(mapName) {
	if (GBrowserIsCompatible()) {
		  
		var pointCenter = new GLatLng(-27.683528,135);
		var map = new GMap2(document.getElementById("map_canvas"));
		map.setCenter(pointCenter, 3);
		map.addControl(new GSmallMapControl());
		map.addControl(new GMapTypeControl());
		
		var pointSW = new GLatLng(-47.754098,105.46875);
		var pointNE = new GLatLng(-6.903496,166.464844);
		
		var groundOverlay = new GGroundOverlay("http://www.reptilesdownunder.com/test/" + mapName + ".png", new GLatLngBounds(pointSW, pointNE));
		
		map.addOverlay(groundOverlay);
   
	}
}


function swapImage(imgName, imgSrc) {
	//alert(imgName);
	document[imgName].src = imgSrc;
}