$('#R1').prop("checked",true); } if($('#R2').val()=="1"){ $('#R2').prop("checked",true); } }) function checkbox(obj)//根据checked事件改变value值 { if(obj.checked){ obj.value=1; }else{ obj.value=0; } } function checkspell(){//给type赋值 var type; type=$('#R1'...
chkbox.type="checkbox"; chkbox.checked=true; lnk.parentNode.appendChild(chkbox); 以上代码在IE7下,生成的Checkbox无法正确的打上勾。 原因是chkbox控件还没初始化(appendChild),就开始操作它的结果 据此将代码改为即可正确显示: varchkbox=document.createElement("INPUT"); chkbox.type="checkbox"; lnk.pare...
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: $("#...
console.log($("input[type='checkbox']").prop('checked'));//false (3)、除了以上两种方法JQ中还有一个is()方法同样可以判断checkbox的状态 is() 方法代码如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 console.log($("input[type='checkbox']").is(':checked'));//false 要特别注意不...
A checkbox (check box, tickbox, tick box) is a graphical widget that permits the user to make a binary choice, i.e. a choice between one of two possible mutually exclusive options. For example, the user may have to answer 'yes' (checked) or 'no' (not checked) on a simple yes/no...
$(function() { $("#btnCheck").click(function() { varisChecked = $("#chkPassport").is(":checked"); if(isChecked) { alert("CheckBox checked."); }else{ alert("CheckBox not checked."); } }); }); Screenshot Browser Compatibility...
How do you check if an HTML form checkbox field is checked in JavaScript?Craig Buckler
4. Checking if a checkbox is checked with JavaScriptBecause jQuery is just another layer on top of JavaScript and it provides us a way to access directly the JavaScript object, we can use pure JavaScript to examine the state.We can access the JavaScript object by using brackets [0] or by...
Find out if a checkbox is checked or not: varx = document.getElementById("myCheck").checked; Try it Yourself » Example Use a checkbox to convert text in an input field to uppercase: document.getElementById("fname").value= document.getElementById("fname").value.toUpperCase(); ...
If no element fits, or the selector is not valid, then the response will be ‘false’. This method traverses along the DOM elements to find a match, which satisfies the passed parameter. if ($(“input[type=checkbox]”).is(“:checked”)) { alert(“Checked”); }...