在用window.open打开的窗体中替父窗体select创建option并选中

在用window.open打开的窗体中为父窗体select创建option并选中
判断select选项中 是否存在Value="paraValue"的Item
2向select选项中 加入一个Item
3从select选项中 删除一个Item
4删除select中选中的项
5修改select选项中 value="paraValue"的text为"paraText"
6设置select中text="paraText"的第一个Item为选中
7设置select中value="paraValue"的Item为选中
8得到select的当前选中项的value
9得到select的当前选中项的text
10得到select的当前选中项的Index
11清空select的项

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动态删除select中的所有options：
function deleteAllOptions(sel){
sel.options.length=0;
}
动态删除select中的某一项option：
function deleteOption(sel,indx){
sel.options.remove(indx);
}
动态添加select中的项option:
function addOption(sel,text,value){
sel.options.add(new Option(text,value));
}
上面在IE和FireFox都能测试成功，希望以后可以用上。

===========================================

js 代码
// 1.判断select选项中 是否存在Value="paraValue"的Item????????
function jsSelectIsExitItem(objSelect, objItemValue) {????????
???? var isExit = false;????????
???? for (var i = 0; i < objSelect.options.length; i++) {????????
???????? if (objSelect.options[i].value == objItemValue) {????????
???????????? isExit = true;????????
???????????? break;????????
???????? }????????
???? }????????
???? return isExit;????????
}?????????
???
// 2.向select选项中 加入一个Item????????
function jsAddItemToSelect(objSelect, objItemText, objItemValue) {????????
???? //判断是否存在????????
???? if (jsSelectIsExitItem(objSelect, objItemValue)) {????????
???????? alert("该Item的Value值已经存在");????????
???? } else {????????
???????? var varItem = new Option(objItemText, objItemValue);??????
???????? objSelect.options.add(varItem);?????
???????? alert("成功加入");?????
???? }????????
}????????
???
// 3.从select选项中 删除一个Item????????
function jsRemoveItemFromSelect(objSelect, objItemValue) {????????
???? //判断是否存在????????
???? if (jsSelectIsExitItem(objSelect, objItemValue)) {????????
???????? for (var i = 0; i < objSelect.options.length; i++) {????????
???????????? if (objSelect.options[i].value == objItemValue) {????????
???????????????? objSelect.options.remove(i);????????
???????????????? break;????????
???????????? }????????
???????? }????????
???????? alert("成功删除");????????
???? } else {????????
???????? alert("该select中 不存在该项");????????
???? }????????
}????
???
???
// 4.删除select中选中的项????
function jsRemoveSelectedItemFromSelect(objSelect) {????????
???? var length = objSelect.options.length - 1;????
???? for(var i = length; i >= 0; i--){????
???????? if(objSelect[i].selected == true){????
???????????? objSelect.options[i] = null;????
???????? }????
???? }????
}??????
???
// 5.修改select选项中 value="paraValue"的text为"paraText"????????
function jsUpdateItemToSelect(objSelect, objItemText, objItemValue) {????????
???? //判断是否存在????????
???? if (jsSelectIsExitItem(objSelect, objItemValue)) {????????
???????? for (var i = 0; i < objSelect.options.length; i++) {????????
???????????? if (objSelect.options[i].value == objItemValue) {????????
???????????????? objSelect.options[i].text = objItemText;????????
???????????????? break;????????
???????????? }????????
???????? }????????
???????? alert("成功修改");????????
???? } else {????????
???????? alert("该select中 不存在该项");????????
???? }????????
}????????
???
// 6.设置select中text="paraText"的第一个Item为选中????????
function jsSelectItemByValue(objSelect, objItemText) {????????????
???? //判断是否存在????????
???? var isExit = false;????????
???? for (var i = 0; i < objSelect.options.length; i++) {????????
???????? if (objSelect.options[i].text == objItemText) {????????
???????????? objSelect.options[i].selected = true;????????
???????????? isExit = true;????????
???????????? break;????????
???????? }????????
???? }??????????????
???? //Show出结果????????
???? if (isExit) {????????
???????? alert("成功选中");????????
???? } else {????????
???????? alert("该select中 不存在该项");????????
???? }????????
}????????
???
// 7.设置select中value="paraValue"的Item为选中????
objSelect.value = objItemValue;????
???????
// 8.得到select的当前选中项的value????
var currSelectValue = objSelect.value;????
???????
// 9.得到select的当前选中项的text????
var currSelectText = objSelect.options[document.all.objSelect.selectedIndex].text;????
???????
// 10.得到select的当前选中项的Index????
var currSelectIndex = objSelect.selectedIndex;????
???????
// 11.清空select的项????
objSelect.options.length = 0;???

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整个实例的完整代码如下：

<meta name="description" content="javascript select options text value add modify delete set">
<script language="javascript">
<!--
// Author: i@lxl.cn
// Modify: i@cnlei.com
function watch_ini(){ // 初始
for(var i=0; i<arguments.length; i++){
?? var oOption=new Option(arguments[i],arguments[i]);
?? document.getElementById("MySelect")[i]=oOption;
}
}
function watch_add(f){ // 增加
?? var oOption=new Option(f.word.value,f.word.value);
?? f.keywords[f.keywords.length]=oOption;
}
function watch_sel(f){ // 编辑
f.word.value = f.keywords[f.keywords.selectedIndex].text;
}
function watch_mod(f){ // 修改
f.keywords[f.keywords.selectedIndex].text = f.word.value;
}
function watch_del(f){ // 删除
f.keywords.remove(f.keywords.selectedIndex);
}
function watch_set(f){ // 保存
var set = "";
for(var i=0; i<f.keywords.length; i++){
set += f.keywords[i].text + ";";
}
confirm(set);
}
//-->
</script>
</head>
<body>
<form name="watch" method="post" action="">
<select id="MySelect" name="keywords" size="10" onchange="watch_sel(this.form)"></select><br>
<script language="javascript">
<!--
watch_ini("我","你","妳","他","她","它","尔"); // 初始关键词
//-->
</script>
<input type="text" name="word" /><br />
<input type="button" value="增加" onclick="watch_add(this.form);" />
<input type="button" value="修改" onclick="watch_mod(this.form);" />
<input type="button" value="删除" onclick="watch_del(this.form);" />
<input type="button" value="保存" onclick="watch_set(this.form);" />
</form>
</body>
</html>

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