JavaScript first Implementation button selection, functional _javascript skills

1, a new document (with Notepad software, in order to make the browser open is not garbled, in the software file to find the code, modify it to UTF-8 code. Or click on Google browser in the upper right corner of the three bar, select more Tools-> encoding->utf-8), rename it (for example: The first Java script.html Note: Must change the extension to. html).

2, the format of Notepad to open, to write.

3, the following is written "button select the implementation of" the relevant code:

4, the screenshot is: