// JavaScript Document
function toggleLayer(strLayerName) {
	var lyrTarget		= $("#layer_" + strLayerName);
	var lyrIndicator	= $("#" + strLayerName + "_indicator");
	
	switch (lyrTarget.css("display")) {
		case "none" :
			lyrTarget.css("display", "block");
			lyrIndicator.html("-");
			break;
			
		default :
			lyrTarget.css("display", "none");
			lyrIndicator.html("+");
			break;
	}
}