有選擇性的重復造一些輪子，未必是件壞事。Aaron的博客上加了一個懸浮菜單，貌似顯得很高大上了。雖然這類小把戲也不是頭一次見了，但是從未自己寫過。今天就選擇性的拿這個功能寫一寫。下面是這個輪子的開發過程，也可以當作是一篇需求文檔的分析和實現過程。

演示地址：http://sandbox.runjs.cn/show/to8wdmuy

源碼下載：https://github.com/bjtqti/floatmenu

第一步創建dom節構：

代碼如下:

test1

The past can hurt. But you can either run from it or learn from it

過去是痛楚的，但你要么逃避，要么從中成長

One meets his destiny on the road he takes to avoid it

往往在逃避命運的路上，卻與之不期而遇

Rules are meant to be broken

規則就該被打破。

Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul.

歲月流逝只令容顏蒼老，激情不再卻使心靈枯萎。

test2

只有不斷地練習學到的知識，你才能真正掌握它。

Live every day to the fullest.

盡享每日。

Keep your eyes on the stars, and your feet on the ground.

志存高遠，腳踏實地。

Always be up for an unexpected adventure.

隨時準備開始一場意外冒險吧。

Life is full of disappointment. You can't dwell on things. You have to move on.

生活常不如意，別沉溺往事，要勇往直前。

I'm a free spirit. I can't be caged.

我的靈魂是自由的，不該被束縛。

Sometimes the heart sees what is invisible to the eye.

目不見者，心可感之

The simple things are also the most extraordinary things, and only the wise can see them.

最平凡的事也是最非凡的事，只有智者才明白。

test3

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test4

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隱藏

test1

test2

test3

test4

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