用jq如何判断单选或者多选题是否已选择..

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
</head><body>
    <dl>
        <dt>这次培训你觉得？ (单选) </dt>
        <dd>
            <input class="checkRadio" value="201311051647404033602d67c53fcc42d7a4" name="A" type="radio" />A很好</dd>
        <dd>
            <input class="checkRadio" value="201311051647404033602f23500a1e40d58c" name="A" type="radio" />B一般</dd>
        <dd>
            <input class="checkRadio" value="2013110516474040336024b7dae3944a0f8b" name="A" type="radio" />C很差</dd>
    </dl>
    <dl>
        <dt>这次培训又你觉得？ (单选) </dt>
        <dd>
            <input class="checkRadio" value="201311051647404033602d67c53fcc42d7a4" name="B" type="radio" />A很好</dd>
        <dd>
            <input class="checkRadio" value="201311051647404033602f23500a1e40d58c" name="B" type="radio" />B一般</dd>
        <dd>
            <input class="checkRadio" value="2013110516474040336024b7dae3944a0f8b" name="B" type="radio" />C很差</dd>
    </dl>
    <dl>
        <dt>这次负责培训的讲师需要改善哪些 (多选)</dt>
        <dd>
            <input class="checkbox" value="201311051647404033602faf1e962e4c55bc" type="checkbox" name="C" />A亲和力</dd>
        <dd>
            <input class="checkbox" value="2013110516474040336028e9bb946242db9f" type="checkbox" name="C" />B专业</dd>
        <dd>
            <input class="checkbox" value="201311051647404033602d9a10ab0c4e5a82" type="checkbox" name="C" />C互动</dd>
        <dd>
            <input class="checkbox" value="201311051647404033602313738a324f498b" type="checkbox" name="C" />D课件</dd>
        <dl>
            <dt>这次负责培训的讲又师需要改善哪些 (多选)</dt>
            <dd>
                <input class="checkbox" value="201311051647404033602faf1e962e4c55bc" type="checkbox" name="D" />A亲和力</dd>
            <dd>
                <input class="checkbox" value="2013110516474040336028e9bb946242db9f" type="checkbox" name="D" />B专业</dd>
            <dd>
                <input class="checkbox" value="201311051647404033602d9a10ab0c4e5a82" type="checkbox" name="D" />C互动</dd>
            <dd>
                <input class="checkbox" value="201311051647404033602313738a324f498b" type="checkbox" name="D" />D课件</dd>
        </dl>
        <input type="submit" value="提交" />
</body>
</html>直接上html了..
就是 点击提交的时候 如何判断每个题目的选项不能为空..
求指导,求教育..js

解决方案 »

  1.   

        <input type="button" value="提交" />
    <script type="text/javascript">
    $(function(){
        $("input:button").click(function(){
            $.each($("dl"),function(i,item){
                if(!$(this).find("input:checked").size()){
                    alert("第"+(i+1)+"道题目还没选择！");
                    return false;
                }
            });
        })
    })
    </script>
      

  2.   


    if($("input[type='radio'][selector1]:checked").length==0){//这里可以根据你的需要判断length的长度，然后做相应的事情
        alert('msg');
    }
    if($("input[type='checkbox']:checked").length==0){
        alert('msg');
    }$("input[type='radio'][selector1][selector2]:checked")表示已选中的单选按钮其中selector1,2表示选择器，根据你的需要填写，type='radio'就是一个选择器，选择器可以写多个。
    楼主可以看看jquery的API，里面写的很清晰