ajax的返回，兼容火狐

  response.setContentType("text/html;charset=utf-8");

java.io.PrintWriter pw = null;

String returnValue = ""+zhuangtai;

try {

pw = response.getWriter();

pw.write(returnValue);

} catch (java.io.IOException e) {

returnValue = "0";

e.printStackTrace();

}

return null;