The method of realizing up-moving and moving down of the select list by JS _javascript tips

In this paper, the method of moving up and down of the select list by JS is described. Share to everyone for your reference. Specifically as follows:

Here to introduce the select list of items up and down the JS code, you can sort of hand work, previously we have seen, engaged in web programming friends often use.

The effect is as shown in the following illustration:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-select-move-up-down-codes/

The specific code is as follows:

The

wants this article to help you with your JavaScript programming.