如下：一个用户登录，怎么消除一开始的alert窗口。能用java代码调用js的函数么？
或者用java传一个flag给js.
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
用户名：
密码：
<%
String name = request.getParameter("name");
String password = request.getParameter("password");
if(name!=null && name.trim().length()>0 && name.equals("tom")&&
password!=null && password.trim().length()>0 && password.equals("1234")){
%> alert("success!")<%
}else{
%> alert("fail!")<%
} %>
</script>
