1、获取选中select的value和text,html
<select id="mySelect">
<option value="1">one</option>
<option value="2">two</option>
<option value="3">three</option>
</select>
通过以下script代码s来获取选中的value和text
$("#mySelect").val(); //获取选中记录的value值
$("#mySelect option:selected").text(); //获取选中记录的text值
2、运用new Option("文本","值")方法添加选项option
var obj = document.getElementById("mySelect");obj.add(new Option("4","4"));
3、删除所有选项option
var obj = document.getElementById("mySelect");obj.options.length = 0;
4、删除选中选项option
var obj = document.getElementById("mySelect");var index = obj.selectedIndex;obj.options.remove(index);
5、修改选中选项option
var obj = document.getElementById("mySelect");
var index = obj.selectedIndex;
obj.options[index] = new Option("three",3); //更改对应的值
obj.options[index].selected = true; //保持选中状态
6、删除select
var obj = document.getElementById("mySelect");
obj.parentNode.removeChild(obj); //移除当前对象
7、select选择的响应事件
$("#mySelect").change(function(){ //添加所需要执行的操作代码})
1.动态创建select
function createSelect(){
var mySelect = document.createElement_x("select");
mySelect.id = "mySelect";
document.body.appendChild(mySelect);
}
2.添加选项option
function addOption(){
//根据id查找对象，
var obj=document.getElementByIdx_x('mySelect');
//添加一个选项
obj.add(new Option("文本","值")); //这个只能在IE中有效
obj.options.add(new Option("text","value")); //这个兼容IE与firefox
}
3.删除所有选项option
function removeAll(){
var obj=document.getElementByIdx_x('mySelect');
obj.options.length=0;
}
4.删除一个选项option
function removeOne(){
var obj=document.getElementByIdx_x('mySelect');
//index,要删除选项的序号，这里取当前选中选项的序号
var index=obj.selectedIndex;
obj.options.remove(index);
}
5.获得选项option的值
var obj=document.getElementByIdx_x('mySelect');
var index=obj.selectedIndex; //序号，取当前选中选项的序号
var val = obj.options[index].value;
6.获得选项option的文本
var obj=document.getElementByIdx_x('mySelect');
var index=obj.selectedIndex; //序号，取当前选中选项的序号
var val = obj.options[index].text;
7.修改选项option
var obj=document.getElementByIdx_x('mySelect');
var index=obj.selectedIndex; //序号，取当前选中选项的序号
var val = obj.options[index]=new Option("新文本","新值");
8.删除select
function removeSelect(){
var mySelect = document.getElementByIdx_x("mySelect");
mySelect.parentNode.removeChild(mySelect);
}
整个实例的完整代码如下：
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<title>javascript select options text value</title>
<meta name="keywords" content="javascript select options text value add modify delete set">
<meta name="description" content="javascript select options text value add modify delete set">
<script language="javascript">
<!--
function watch_ini(){ // 初始
for(var i=0; i<arguments.length; i++){
var oOption=new Option(arguments,arguments);
document.getElementByIdx_x("MySelect")=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.text + ";";
}
confirm(set);
}
//-->
</script>
</head>
<body>
<form name="watch" method="post" action="">
<select id="MySelect" name="keywords" size="10"></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" />
<input type="button" value="修改" />
<input type="button" value="删除" />
<input type="button" value="保存" />
</form>
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【转载，仅作分享，侵删】
作者：丿灬安之若死
原文：https://blog.csdn.net/mp624183768/article/details/87887011
版权声明：本文为博主原创文章，转载请附上博文链接！
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