httpclient解析js跳转

[skyriver_pisces]

最近要用htmlclient解析一个页面，实现模拟登陆，之后上传文件。但是在模拟登陆的时候返回结果总是200，就算把登陆名修改了返回的也是200，是不是因为登陆页面是利用js跳转写的而无法解析。查了查网上的资料有的是这么说。但是要抓取的网站基本上都是通过js来跳转的，该怎么登陆呢？

public class httpclient {
	/**
	 * @throws IOException 
	 * @throws HttpException 
	 * @throws IllegalAccessException 
	 * @throws InstantiationException ****/
	public void gethc(String url) throws HttpException, IOException
	{		
		HttpClient httpclient = new HttpClient();
		httpclient.getHttpConnectionManager().getParams().setConnectionTimeout(5000);
		PostMethod postmethod = new PostMethod("http://10.229.0.71/idquery/LoginAction.do?op=login");
		NameValuePair[] postvalue = {
				 new NameValuePair("BranchCode","441901002"), //用户名
	            // new NameValuePair("pw1","44005177"), //密码
		};
		postmethod.setRequestBody(postvalue);
		int statuscode = httpclient.executeMethod(postmethod);
		
		if(statuscode== 200)
		{
              System.out.println("Login in success!" );
         }

[善良的小聪哥]

隐藏的参数也要加上的。。。。