//Centers the logos to the middle of the sign
Event.observe(window, 'load', function(e){							
		var signs = $$('.store_vendor .sign');
		signs.each(function(sign){
			var overlay = sign.firstDescendant();
			var logo = sign.childElements()[1];
			var overlayDim = overlay.getDimensions();
			
			logo.setStyle({top: overlay.positionedOffset().top + overlayDim.height/2 - logo.height/2 + 'px',
						   left: overlay.positionedOffset().left + overlayDim.width/2 - logo.width/2 + 'px'
						 });
		});

});