zoukankan      html  css  js  c++  java
  • (6个name="hobby"的复选项,两个按钮)来区分三种方法的不同---区别getElementByID,getElementsByName,getElem

    <form>
              请选择你爱好:<br>
              <input type="checkbox" name="hobby" id="hobby1">  音乐
              <input type="checkbox" name="hobby" id="hobby2">  登山
              <input type="checkbox" name="hobby" id="hobby3">  游泳
              <input type="checkbox" name="hobby" id="hobby4">  阅读
              <input type="checkbox" name="hobby" id="hobby5">  打球
              <input type="checkbox" name="hobby" id="hobby6">  跑步 <br>
              <input type="button" value = "全选" onclick = "checkall();">
              <input type="button" value = "全不选" onclick = "clearall();">
              <p>请输入您要选择爱好的序号,序号为1-6:</p>
              <input id="wb" name="wb" type="text" >
              <input name="ok" type="button" value="确定" onclick = "checkone();">
            </form>
            <script type="text/javascript">
            function checkall(){
                var hobby = document.getElementsByTagName("input");
                for(var i=0; i<hobby.length; i++){
                  hobby[i].checked=true;
                }
            }
            
            function clearall(){
                var hobby = document.getElementsByName("hobby");
               for(var i=0; i<hobby.length;i++ ){
                   hobby[i].checked=false;
               }
            }
            
            function checkone(){
                var j=document.getElementById("wb").value;
                 if(parseInt(j)>6||parseInt(j)<1)
                {
                    alert("请输入1-6之间的数字");
                }
                var hobby=document.getElementsByName("hobby");
                hobby[parseInt(j)-1].checked=true;
            }
            </script>

  • 相关阅读:
    C# Invoke 和 BeginInvoke 的的区别
    ArcGIS API For JS 中设置图层显示的方法(ArcGISDynamicMapServiceLayer)setVisibleLayers(ids, doNotRefresh?)介绍
    OpenLayer学习之矢量地图
    Python爬去百思不得其解的图片(VS2017)
    .NET面试试题
    arcgis for javascript 鼠标移到对象上面则置亮并弹出气泡
    ASP.NET MVC 中IBaseDal接口的封装
    ASP.NET中MemcacheHelper封装
    ASP.NET验证码的封装和使用
    Self-Paced Training (2)
  • 原文地址:https://www.cnblogs.com/oybb/p/7747341.html
Copyright © 2011-2022 走看看