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