js操作select option

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js操作select option

1、获取选中select的value和text,html代码如下：

< select id = " mySelect " > < option value = " 1 " > one < / option> < option value = " 2 " > two < / option> < option value = " 3 " > three < / option> < / select>

则可通过以下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 })

 

 

 

 

 

 

 

 

 

 

http://www.cnblogs.com/xiangpiaopiao2011/archive/2011/06/15/2081580.html