用PAMIE登录weibo的问题，click登录没有响应

Python code

import PAM30def main():    ie=PAM30.PAMIE()    ie.navigate("http://weibo.com/")    ie.setTextBox("loginname","a@b.c")    ie.setTextBox("password","****")#weibo登录按钮的那段代码#<div class="signin"><a href="javascript:void(0);" class="sp" id="login_submit_btn"  title="新浪微博登录" tabindex="5"></a></div>#试用了下面这3种方法，都没有成功，问题在哪？    ie.executeJavaScript("javascript:void(0);")     ie.clickButton("login_submit_btn")    ie.clickElement("login_submit_btn")if __name__ == '__main__':    main()

Python code

ie.clickElement(ie.findElement('a', 'id', 'login_submit_btn'))