(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("display") == "block")
				{
					if($(obj).css("opacity") == "0")
					{
						$(obj).animate({ opacity: ".7" },500);
					}
					else
					{
						$(obj).animate({ opacity: "0" },500);
					}
				}
			}, options.delay);
		});
	}
}(jQuery))