Use jquery to change the background color of the clicked column _ jquery

How to Use jquery to change the color of a topic when you click another topic, but the original color is changed back, this article provides a solution, for more information, see How to Use jquery to change the color of a topic and click another topic. However, the original color is changed back. I have an array a (1, 2, 3. I cyclically traverse the output value of.

The Code is as follows:

• A [0]


• A [1]


• A [2]



Click to change color. Click to change color, but 1 will change back to the original color. Other functions are available in my show method.
The following is my initial code:
HTML code:


The Code is as follows: