Several Rules for writing Js Code

1. Do not use document. write () in large quantities ()

2. Check the client's ability to support objects (progressive) instead of checking its clients, and test the objects to be used.

3. Access existing HTML content instead of adding HTML through Js (separation of behavior layer and structure layer)

4. Do not use a proprietary DOM object (such as document. all of IE)

5. Put the script into A. js file instead of being visible everywhere in HTML.

6. improve websites that run well without client programming, instead of adding scripts first and then adding alternative solutions for non-scripts.

7. Keep the code independent. Do not use global variables that may conflict with other scripts. (Number of available objects)

8. comment out the code function, because you may maintain the code yourself in the future.