Jquery动态改动form的action

url = "choose.jsp?bookcaseId="
								+ encodeURI(encodeURI($
										.trim(data.checkBill.bookShelfNo)))
								+ "&result=" + data.checkBill.checkbillno
								+ "//" + data.checkBill.checkbillid;
     // form2是form的ID
          $("#form2").attr("action", url);