用jquery遍历select下拉选项选中的值

<div>
<select style="width:60px" id="selectID">
<option>选项A</option>
<option>选项B</option>
<option>选项C</option>
<option>选项D</option>
</select>
</div>

 

<script type="text/javascript">
$("#selectID").change(function(){
var $option = $("#selectID option:selected");
alert($option.val());
});

</script>