jQuery.fn.addOverlay = function(){
	return this.each(function(){
		var $container = $(this).prepend("<div class=\"overlay\"><p><img src=\"/css/img/loader.gif\" /></p></div>");
		$container.css('position', 'relative');
		$('.overlay', $container).height( $container.height());
		$('.overlay', $container).width( $container.width());
		$('.overlay', $container).css({ 
			position: 'absolute', 
			'z-index': '9999', 
			'background-color': '#000', 
			color: '#fff', 
			opacity: .4	
		});
		$('.overlay p', $container).css({ 
			'text-align': 'center',
			top: '50%', 
			position: 'relative'
		});				
	});
};

jQuery.fn.removeOverlay = function(){
	return this.each(function(){
		$('div.overlay', $(this)).remove();
	});
};