appendItem( label, value )
<script language="javascript"> function addItemsToList(){ var list = document.getElementById('myMenuList'); // add item with just the label list.appendItem('One'); // add item with label and value list.appendItem('Two', 999); // Select the first item list.selectedIndex = 0; } </script> <button label="Add items" oncommand="addItemsToList()"/> <menulist id="myMenuList"> <menupopup/> </menulist>