JavaScript implements two select drop-down box options to move left and right

This article introduces JavaScript code to implement two select drop-down box options to move left and right. Interested students can refer to this article

I have nothing to do today and I wrote a drop-down with two select using js. A small program that can move elements between boxes. I have just started learning JavaScript and there are still many areas for optimization.

Javascript code

The above is the javascript code, and the following is the html plus css code.

The code is as follows

Html code

The code is as follows

.select_move { margin:0px auto; width:206px; height:140px; margin-top:300px;} .select_move_1 { float:left;} .select_move_2 { float:left; } .select_move_3 { float:left;} < ;body>                                                        first"size="10"id="first"multiple="multiple">                                                                                                             "Toyota">Toyota                                                                                                                                                         < /option> #                                                                                                              # & lt; inputtype = "Button" Value = "=== & GT;" OnClick = "Moveall ()" /& GT; & LT; & LT; "value="<------"onclick="moveLeft()"/>                                                                                    "onclick="moveAllLeft()"/>                                                                                                            id="secend"multiple="multiple">                                                                           # ​ ## Related recommendations: Sample code sharing using JavaScript to implement two select drop-down box options to move left and right

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