js操作select下拉列表的一些通用代码

<script type="text/javascript"><!--
google_ad_client = "pub-4490194096475053";
/* 内容页,300x250,第一屏 */
google_ad_slot = "3685991503";
google_ad_width = 300;
google_ad_height = 250;
// --></script>
<script src="http://pagead2.googlesyndication.com/pagead/show_ads.js" type="text/javascript"></script>

设置select中value="paraValue"的Item为选中
//document.all.objSelect.value = objItemValue;

//得到select的当前选中项的value
//var currSelectValue = document.all.objSelect.value;

//得到select的当前选中项的text
//var currSelectText = document.all.objSelect.options[document.all.objSelect.selectedIndex].text;

//得到select的当前选中项的Index
//var currSelectIndex = document.all.objSelect.selectedIndex;

//清空select的项
// document.all.objSelect.options.length = 0;

http://www.corange.cn/archives/2008/10/2118.html