思路:1、获取元素。2、用for循环历遍数组,把checkbox的checked设置为true即实现全选,把checkbox的checked设置为false即实现不选。3、通过if判断,如果checked为true选中状态的,就把checked设为false不选状态,如果checked为false不选状态的,就把checked设为true选中状态。 JS代码: 1 2 window.onload=function(){ 3 v...
if($('#R1').val()=="1"){ $('#R1').prop("checked",true); } if($('#R2').val()=="1"){ $('#R2').prop("checked",true); } }) function checkbox(obj)//根据checked事件改变value值 { if(obj.checked){ obj.value=1; }else{ obj.value=0; } } function checkspell(){//给t...
javascript_IE7中CheckBox的checked=true不打勾解决方法: var chkbox = document.createElement("INPUT");chkbox.type = "checkbox";chkbox.checked=true;lnk.parentNode.appendChild(chkbox);以上代码在IE7下,生成的Checkbox无法正确的打上勾。原因是 chkbox控件还没初始化(appendChild),就开始操作它的结果据此将代...
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$(':checkbox[type="checkbox"]').each(function(){ $(this).click(function(){ if($(this).prop('checked')){ $(':checkbox[type="checkbox"]').removeAttr('checked'); $(this).prop('checked','true'); } }); }); 可是调试发现 前面的勾选依然显示打钩,虽然他们的属性 checked 为 false ...
1、function checked(){ var isChecked = false; $("input[@type=checkbox]").each( function(){ if($(this).attr("checked")){ isChecked=true; return; } }) if(!isChecked){ alert("请至少选择一条记录进行操作!"); } return isChecked; ...
checkBoxObj.appendTo('#checked'); document.getElementById("btn").addEventListener('click',function() { letinstance:CheckBox=getComponent(document.getElementById("checked"),"checkbox"); instance.checked=instance.checked===true?false:true; }); ...
JavaScript checkbox checked object and property As you can see from the above examples, including checkboxes in your web pages is easy. The checked property allows you to set the checkbox initial value or return the value if the user has selected the checkbox or not. ...
My knowledge of Javascript is very basic and I have a pdf form I cannot figure out the javascript. I need to calculate taxes based on which checkbox is checked. If checkbox 1 is checked, then need to calculate Federal tax (5%) on the "total", if checkbox 2 is checked then the value...
function checkAgree() { if (document.getElementbyId("checkboxAgree").getAttribute("checked") )//checkbox is checked { location.href = "page.html"; //load the next page. } else { Alert("You need to check the box before you can continue"); } } document.getElementById("proceed-button"...