日期:2014-05-18 浏览次数:20929 次
<select id=s1>
<option >1</option>
<option >2</option>
<option >3</option>
<option >4</option>
<option >5</option>
<option >6</option>
</select>
<input type=button id=b1 value=go onclick="aa()">
<script>
function aa(){
    var f=new ActiveXObject("WScript.SHELL");
    s1.focus();
    f.SendKeys("%{DOWN}");
}
</script>