<html lang="en">
<head>
<meta charset="utf-8">
<title>选项卡默认值</title>
<style>
</style>
<script src="http://lib.sinaapp.com/js/jquery/1.9.1/jquery-1.9.1.min.js"></script>
</head>
<body>
<select name="sel" id="selectstation">
<option value="1" id='first_options'>苹果</option>
<option value="2">西瓜</option>
<option value="3">无花果</option>
<option value="4">艾叶果</option>
<option value="5">清果</option>
</select>
<h2>兄弟选择器 ~ </h2>
<input type="button" id="brother" value='兄弟选择器' />
<h2>就近选择器 + </h2>
<input type="button" id="next" value='就近选择器' />
<h2>子代选择器 > </h2>
<input type="button" id="child" value='子代选择器' />
</body>
<script>
$("#brother").click(function(){
var second = $('#first_options ~ option').val();
alert(second);
});
$('#next').click(function(){
var three = $('#first_options + option').val();
alert(three);
});
$('#child').click(function(){
str = '';
$('#selectstation option').each(function(i){
str += $('#selectstation option:eq('+i+')').text()+',';
});
alert(str);
});
</script>
</html>
