[JQuery] Error 내역 alert 표시

$.ajax({
	url: '/board/write_update.php',
	type: 'POST',
	processData: false,
	contentType: false,
	data: formData,
	cache : false,
	timeout: 300000,
	datatype:"json",
	success: function (data, status) {
		alert(data.href);
		location.replace(data.href);
	},
	error : function(request,status,error) {
		alert("code:"+request.status+"\n"+"message:"+request.responseText+"\n"+"error:"+error);
	}
});