将鼠标悬停在图标工具提示上后，我无法获得工具提示文本。我需要获取工具提示文本，这是html代码。
<a class="tooltip" onclick="SocialAuth.showOpenIDLoginWindow('google');_gaq.push(['_trackEvent','LoginForm','google-login','google login was clicked']);" href="javascript:void(0);"><span>We dont store your password or access your contacts on your Google account.</span><img class="social" height="39" width="40" src="/images/login/google.png"/>