(function($){
	$.fn.blink = function(options){
		var defaults = { delay:500 };
		var options = $.extend(defaults, options);
		
		return this.each(function(){
			var obj = $(this);
			setInterval(function(){
				if($(obj).css("visibility") == "visible"){
					$(obj).css('visibility','hidden');
				} else {
					$(obj).css('visibility','visible');
				}
			}, options.delay);
		});
	}
}(jQuery));