$(document).ready(function ()
{  
 			$("#fbholder").css("left","-320px");
			$("#fbholder").hover(function(){
				$("#fbholder").animate({left: "0px"}, {queue:false,duration:500} );
				$("#fbc").addClass("fb_button_zamknij"); 
				return false;
			},
			function(){	
				$("#fbholder").animate({left: "-320px"}, {queue:false,duration:500} );
				$("#fbc").removeClass("fb_button_zamknij"); 
				return false;
			});
});