update docs

Author: xuanzhi33

docs/index.md

@@ -1,37 +1,9 @@
-## Welcome to GitHub Pages
-
-You can use the [editor on GitHub](https://github.com/xuanzhi33/translate.js/edit/master/docs/index.md) to maintain and preview the content for your website in Markdown files.
-
-Whenever you commit to this repository, GitHub Pages will run [Jekyll](https://jekyllrb.com/) to rebuild the pages in your site, from the content in your Markdown files.
-
-### Markdown
-
-Markdown is a lightweight and easy-to-use syntax for styling your writing. It includes conventions for
-
-```markdown
-Syntax highlighted code block
-
-# Header 1
-## Header 2
-### Header 3
-
-- Bulleted
-- List
-
-1. Numbered
-2. List
-
-**Bold** and _Italic_ and `Code` text
-
-[Link](url) and ![Image](src)
-```
-
-For more details see [GitHub Flavored Markdown](https://guides.github.com/features/mastering-markdown/).
-
-### Jekyll Themes
-
-Your Pages site will use the layout and styles from the Jekyll theme you have selected in your [repository settings](https://github.com/xuanzhi33/translate.js/settings). The name of this theme is saved in the Jekyll `_config.yml` configuration file.
-
-### Support or Contact
-
-Having trouble with Pages? Check out our [documentation](https://docs.github.com/categories/github-pages-basics/) or [contact support](https://github.com/contact) and we’ll help you sort it out.
+## 用法：
+1.在引入本js前需先引入jQuery
+2.本js用于为中文网页创建英文版本
+3.请将本js在</body>前引入
+4.格式：<element en="[英语内容]">[中文原文]</element>
+如 <p en="helloworld">你好世界</p>
+5.语言切换方式
+自动切换：系统语言为英文时访问该页面将自动显示为英文。
+手动切换：需在页面上添加class为transBtn的按钮，用户点击该按钮来切换语言。