js操作select下拉式清單的一些通用代碼

//設定select中value="paraValue"的Item為選中
//document.all.objSelect.value = objItemValue;

//得到select的當前選中項的value
//var currSelectValue = document.all.objSelect.value;

//得到select的當前選中項的text
//var currSelectText = document.all.objSelect.options[document.all.objSelect.selectedIndex].text;

//得到select的當前選中項的Index
//var currSelectIndex = document.all.objSelect.selectedIndex;

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