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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 4.01//ZH-CN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html"> <head> <script language=JavaScript> function $(id) { return document.getElementByIdx_x(id) } function show() { var selectObj=$("area") var myOption=document.createElement_x("option") myOption.setAttribute("value","10") myOption.appendChild(document.createTextNode("上海")) var myOption1=document.createElement_x("option") myOption1.setAttribute("value","100") myOption1.appendChild(document.createTextNode("南京")) selectObj.appendChild(myOption) selectObj.appendChild(myOption1) } function choice() { var index=$("area").selectedIndex; var val=$("area").options[index].getAttribute("value") if(val==10) { var i=$("context").childNodes.length-1; var remobj=$("context").childNodes[i]; remobj.removeNode(true) var sh=document.createElement_x("select") sh.add(new Option("浦东新区","101")) sh.add(new Option("黄浦区","102")) sh.add(new Option("徐汇区","103")) sh.add(new Option("普陀区","104")) $("context").appendChild(sh) } if(val==100) { var i=$("context").childNodes.length-1; var remobj=$("context").childNodes[i]; remobj.removeNode(true) var nj=document.createElement_x("select") nj.add(new Option("玄武区","201")) nj.add(new Option("白下区","202")) nj.add(new Option("下关区","203")) nj.add(new Option("栖霞区","204")) $("context").appendChild(nj) } } function calc() { var x=$("context").childNodes.length-1; alert(x) } function remove() { var i=$("context").childNodes.length-1; var remobj=$("context").childNodes[i]; remobj.removeNode(true) } </script> <body> <div id="context"> <select id="area" onchange="choice()"> </select> </div> <input type=button value="显示" onclick="show()"> <input type=button value="计算结点" onclick="calc()"> <input type=button value="删除" onclick="remove()"> </body> </html>
改进版：在select中添加、修改、删除option元素
1 function watch_ini(){ // 初始 2 for(var i=0; i<arguments.length; i++){ 3 var word = document.createElement_x("OPTION"); 4 word.text = arguments[i]; 5 watch.keywords.add(word); // watch. is form name 6 } 7 } 8 function watch_add(f){ // 增加 9 var word = document.createElement_x("OPTION"); 10 word.text = f.word.value; 11 f.keywords.add(word); 12 }
上述 add() 方法只在IE下有效，为兼容FF和Opera，对上述代码进行了一下改进，改动后代码如下：
1 function watch_ini(){ // 初始 2 for(var i=0; i<arguments.length; i++){ 3 var oOption=new Option(arguments[i],arguments[i]); 4 document.getElementByIdx_x("MySelect")[i]=oOption; 5 } 6 } 7 function watch_add(f){ // 增加 8 var oOption=new Option(f.word.value,f.word.value); 9 f.keywords[f.keywords.length]=oOption; 10 }
整个实例的完整代码如下：
1 <!doctype html public "-//w3c//dtd html 4.0 transitional//en"> 2 <html> 3 <head> 4 <title>javascript select options text value</title> 5 <meta name="keywords" content="javascript select options text value add modify delete set"> 6 <meta name="description" content="javascript select options text value add modify delete set"> 7 <script language="javascript"> 8 <!-- 9 function watch_ini(){ // 初始 10 for(var i=0; i<arguments.length; i++){ 11 var oOption=new Option(arguments[i],arguments[i]); 12 document.getElementByIdx_x("MySelect")[i]=oOption; 13 } 14 } 15 function watch_add(f){ // 增加 16 var oOption=new Option(f.word.value,f.word.value); 17 f.keywords[f.keywords.length]=oOption; 18 } 19 function watch_sel(f){ // 编辑 20 f.word.value = f.keywords[f.keywords.selectedIndex].text; 21 } 22 function watch_mod(f){ // 修改 23 f.keywords[f.keywords.selectedIndex].text = f.word.value; 24 } 25 function watch_del(f){ // 删除 26 f.keywords.remove(f.keywords.selectedIndex); 27 } 28 function watch_set(f){ // 保存 29 var set = ""; 30 for(var i=0; i<f.keywords.length; i++){ 31 set += f.keywords[i].text + ";"; 32 } 33 confirm(set); 34 } 35 //--> 36 </script> 37 </head> 38 <body> 39 <form name="watch" method="post" action=""> 40 <select id="MySelect" name="keywords" size="10" onchange="watch_sel(this.form)"></select><br> 41 <script language="javascript"> 42 <!-- 43 watch_ini("我","你","妳","他","她","它","尔"); // 初始关键词 44 //--> 45 </script> 46 <input type="text" name="word" /><br /> 47 <input type="button" value="增加" onclick="watch_add(this.form);" /> 48 <input type="button" value="修改" onclick="watch_mod(this.form);" /> 49 <input type="button" value="删除" onclick="watch_del(this.form);" /> 50 <input type="button" value="保存" onclick="watch_set(this.form);" /> 51 </form>
用一个字符串创建一个数组方法:
1 <script language="javascript"> 2 </body> 3 </html> 4 <script> 5 function spli(){ 6 datastr="2,2,3,5,6,6"; 7 var str= new Array(); 8 str=datastr.split(","); 9 for (i=0;i<str.length ;i++ ) 10 { document.write(str[i]+"<br/>"); } 11 } 12 spli(); 13 </script>
PS:在ie上运行良好，在火狐上调试出现错误，原因如下
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
此内容是本人在查找资料的时候找到的，写得很详细，给大家分享分享，并非原创，请见谅！（感谢上述内容的提供者>_<）
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原文地址：http://www.cnblogs.com/mallocxw/p/4728820.html
