checked属性是最直接、最常用的方法来判断Checkbox是否被选中。通过获取Checkbox元素,然后检查其checked属性值即可。 实际案例:基础判断 <!DOCTYPEhtml>Checkbox Checked ExampleCheck me!Check if CheckedfunctioncheckCheckbox(){varcheckbox=document.getElementById("myCheckbox");if(checkbox.checked){alert("Checkbox is ...
多选框checkbox: $("#chk1").attr("checked",'');//不打勾 $("#chk2").attr("checked",true);//打勾 if($("#chk1").attr('checked')==undefined) //判断是否已经打勾 单选组radio: $("input[@type=radio]").attr("checked",'2');//设置value=2的项目为当前选中项 下拉框select: $("#...
How to make field required with JavaScript if checkbox is checked March 13, 2015 Really simple solution that will allow you to make fields required below Fields need to be required if checked: document.getElementById("needRequired").addEventListener('change', function(){ document.getElement...
How do you check if an HTML form checkbox field is checked in JavaScript?Craig Buckler
If you're using the compiled (or minified) bootstrap.js, there is no need to include this—it's already there. What's inside Transition.js is a basic helper for transitionEnd events as well as a CSS transition emulator. It's used by the other plugins to check for CSS transition ...
I am looking for a javascript to cause a popup info box IF a checkbox from a radio button is selected. I have a section PDF form that involves how an employee was transported to get medical care. They are given 3 options. There are 3 radio buttons that correspond with t...
Finally, the function is granted to the public domain--use it as you wish. InstructionsProvide the form name and the field name of the checkbox as the parameters to the function. Then specify true or false as the CheckValue, depending on if you want to check or uncheck all the ...
check.type ="checkbox"; // 使用Observer 类扩展checkbox extend(new Observer(),check ); // 使用定制的Update函数重载 check.Update = function( value ){ this.checked = value; }; // 增加新的观察者到我们主要的被观察者的观察者列表中 controlCheckbox.AddObserver(check ); ...
这样就可以使用JQuery发送数据了。 另外一种方法,是构造一个form,利用form来进行提交。 使用Javascript/form提交GET/POST数据提交方式 代码语言:javascript 代码运行次数:0 运行 AI代码解释 /* * @url: url link * @action: "get", "post" * @json: {'key1':'value2', 'key2':'value2'} ...
letmyModule={myProperty:"someValue",// 对象字面值包含了属性和方法(properties and methods).// 例如,我们可以定义一个模块配置进对象:myConfig:{useCaching:true,language:"en"},// 非常基本的方法myMethod:function(){console.log("Where in the world is Paul Irish today?");},// 输出基于当前配置co...