[sample] select box에 option추가 및 선택

<script language=javascript>
var m_index = 0;
function add()
{
    m_index++;
   
        var oNewNode=document.createElement("option");
        oNewNode.setAttribute("value", m_index);
        oNewNode.innerText= m_index;
        oNewNode.selected = true;
        obj_select.appendChild ( oNewNode );
}
</script>

<input type=button onClick=javascript:add() value="add">

<select name=obj_select>

</select>