js method to add options to selected_javascript skills

The example in this article describes the method of adding options to selected in js. Share it with everyone for your reference. The specific implementation method is as follows:

<select id="Mmonth">
<option>1</option>
</select>
<input type="button" onclick="a()" value="添加"/>
<script>
function a(){
 document.getElementById("Mmonth").options.add(new Option(1,1));
}
</script>

I hope this article will be helpful to everyone’s JavaScript programming design.