Facebook登录按钮悬停框

Question

如何使用Facebook登录按钮创建悬停在页面右下方的框？

Answer 1

HTML - 把这个任何地方你的文档，你需要

<div id='bottom-right-corner'></div> 

CSS

#bottom-right-corner { 
    position: fixed; /* Pin to the window */ 
    z-index: 9999; /* Keep on top of all other content */ 
    bottom: 0px; /* Keep the bottom on the bottom of the page */ 
    right: 20px; /* Keep the right just away from the right edge */ 
}