单选，多选，下拉项的取值 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title></title>
        <style type="text/css">
            #anniu:hover{
                cursor: pointer;
            }
        </style>
    </head>
    <body>
        <!--单选按钮的取值-->
        <div id="anniu" onclick="xuanze()">
            点击选择单选项选中的值
        </div>
        <input type="radio" name="sex" id="sex1" value="男" />男
        <input type="radio" name="sex" id="sex2" value="女" />女
        <br />
        <!--多选框的选择-->
        <input type="checkbox" name="duoxuan" id="duoxuan1" value="关羽" />关羽
        <input type="checkbox" name="duoxuan" id="duoxuan2" value="张飞" />张飞
        <input type="checkbox" name="duoxuan" id="duoxuan3" value="赵云" />赵云
        <input type="checkbox" name="duoxuan" id="duoxuan4" value="黄忠" />黄忠
        <input type="checkbox" name="duoxuan" id="duoxuan5" value="马超" />马超
        <input type="checkbox" name="quanxuan" id="quanxuan" value="" onclick="qx()"/>五虎上将
        <br />
        <!--下拉框的选择-->
        <select name="" id="xiala" onchange="bian()">
            <option value="熊猫">熊猫</option>
            <option value="金丝猴">金丝猴</option>
            <option value="鹤顶红">鹤顶红</option>
            <option value="白鳍豚">白鳍豚</option>
        </select>
    </body>
</html>
<script type="text/javascript">
    window.onload = function(){
        
    }
    //单选业务的取值
    function xuanze(){
        var sexattr = document.getElementsByName("sex");
        for (var i = 0;i <sexattr.length;i++) {
            if(sexattr[i].checked){   //因为本身返回的就是true，所以直接可以进
                alert("您选择的性别为：" + sexattr[i].value);
            }
        }
    }
    function qx(){
        var duoxuan = document.getElementsByName("duoxuan");
        var quanxuan = document.getElementById("quanxuan");
        for (var i = 0; i < duoxuan.length;i++) {
            if(quanxuan.checked){
                duoxuan[i].checked = true;
            }else{
                duoxuan[i].checked = false;
            }
        }
    }
    function bian(){
        var xiala = document.getElementById("xiala");
        alert(xiala.value);
    }
</script>

 

posted @ 2018-04-16 18:10  董呀么董  阅读(243)  评论(0)    收藏  举报