// Define the overlay, derived from google.maps.OverlayView
function Label(opt_options) {
	// Initialization
	this.setValues(opt_options);

	// Label specific
	var span = this.span_ = document.createElement('span');
	span.style.cssText = 'position: relative; left: 0%; top: -8px; ' +
			  'white-space: nowrap; border: 0px; font-family:arial; font-weight:bold;' +
			  'padding: 2px; background-color: #ddd; '+
				'opacity: .75; '+
				'filter: alpha(opacity=75); '+
				'-ms-filter: "alpha(opacity=75)"; '+
				'-khtml-opacity: .75; '+
				'-moz-opacity: .75;';

	var div = this.div_ = document.createElement('div');
	div.appendChild(span);
	div.style.cssText = 'position: absolute; display: none';
};
Label.prototype = new google.maps.OverlayView;

// Implement onAdd
Label.prototype.onAdd = function() {
	var pane = this.getPanes().overlayLayer;
	pane.appendChild(this.div_);

	
	// Ensures the label is redrawn if the text or position is changed.
	var me = this;
	this.listeners_ = [
		google.maps.event.addListener(this, 'position_changed',
		function() { me.draw(); }),
		google.maps.event.addListener(this, 'text_changed',
		function() { me.draw(); })
	];
	
};

// Implement onRemove
Label.prototype.onRemove = function() { this.div_.parentNode.removeChild(this.div_ );
	// Label is removed from the map, stop updating its position/text.
	for (var i = 0, I = this.listeners_.length; i < I; ++i) {
		maps.google.event.removeListener(this.listeners_[i]);
	}
};

// Implement draw
Label.prototype.draw = function() {
	var projection = this.getProjection();
	var position = projection.fromLatLngToDivPixel(this.get('position'));

	var div = this.div_;
	div.style.left = position.x + 'px';
	div.style.top = position.y + 'px';
	div.style.display = 'block';

	this.span_.innerHTML = this.get('text').toString();
};