The drop-down menu can be selected or filled in by yourself_javascript skills

Press the Enter key to enter new content, and press DEL to delete the selected content

<select name="s1" onkeydown="catch_keydown(this);" onkeypress="catch_press(this);" style="font-size:12px;"> <option></option>---</select>
[Ctrl A select all Note: If you need to introduce external Js, you need to refresh to execute

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