多选框获取值得方法
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<!--<form>
<input type="radio" name="sex" value="male">Male<br>
<input type="radio" name="sex" value="female">Female
</form>
<form>
<input type="checkbox" name="vehicle" value="Bike">I have a bike<br>
<input type="checkbox" name="vehicle" value="Car">I have a car
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<form name="input" action="html_form_action.php" method="get">
Username: <input type="text" name="user">
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<select id="test">
<option value="volvo">Volvo654</option>
<option value="saab">Saab787</option>
<option value="mercedes">Mercedes787</option>
<option value="audi">Audi7877</option>
</select>
<button id="btn"> 提交</button>
</body>
<script type="text/javascript" src="js/jquery.js" ></script>
<script type="text/javascript" src="js/jquery.min.js" ></script>
<script type="application/javascript">
$("button").on("click",function(){
// $('input:[name="allSel"]').val()
var options=$("#test option:selected"); //获取选中的项
alert(options.val()); //拿到选中项的值
alert(options.text()); //拿到选中项的文本
alert("dfgdf");
});
</script>
</html>
