Deffered и delay

var b=$.Deferred(); 
		var status; 
		var form_data=$('#contact_form').serialize(); 
		 
		$('button').append('<div class="load_form">').delay(3500,b.resolve); 
		var post_form=$.ajax ({	 
				type:"POST", 
				url: "send.php", 
				async: false, 
				data: form_data, 
				success: function (msg){ 
					status=parseInt(msg); 
				} 
			}); 
		 
		$.when (b,post_form).done(function(){alert('GJ');});