如何在取消选中一个复选框时启用所有复选框?使用javascript
我的代码在我选中一个复选框时工作,所有复选框都被禁用。现在我想,如果我取消选中这个选中的复选框,所有复选框都应该被启用。 这是我试过的如何在取消选中一个复选框时启用所有复选框?使用javascript,javascript,Javascript,我的代码在我选中一个复选框时工作,所有复选框都被禁用。现在我想,如果我取消选中这个选中的复选框,所有复选框都应该被启用。 这是我试过的 <tr> <td colspan='3'> <input type='checkbox' name='check1' value = '80' onclick='return(validate())'>Q- 80. Statute of Liberty is in ? </td> </tr> <t
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '80' onclick='return(validate())'>Q- 80. Statute of Liberty is in ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '153' onclick='return(validate())'>Q- 153. Indias Republic day is celebrated on ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '65' onclick='return(validate())'>Q- 65. Popular Language is ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '150' onclick='return(validate())'>Q- 150. Girnar is located at ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '154' onclick='return(validate())'>Q- 154. Largest Waterfall ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '152' onclick='return(validate())'>Q- 152. Asia is an ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '139' onclick='return(validate())'>Q- 139. Diamond is made up of ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '123' onclick='return(validate())'>Q- 123. Largest Desert ? </td> </tr>
Q-80。《自由法》在吗?
Q-153。印度共和国日是在什么时候庆祝的?
Q-65。流行语是什么?
Q-150。Girnar位于?
Q-154。最大的瀑布?
Q-152。亚洲是一个什么样的国家?
Q-139。钻石是由什么组成的?
Q-123。最大的沙漠?
JS:这个javascript是当一个人选中a复选框时,所有的都被禁用。我希望反之亦然,当取消选中复选框时,所有复选框都应被启用
function validate(){
for (i=0; i<document.myForm.check1.length; i++){
if (document.myForm.check1[i].checked !=true){
document.myForm.check1[i].disabled='true';
}
}
}
函数验证(){
对于(i=0;i
功能验证(元素){
对于(i=0;i需要提及的几件事:
- 勾选结果后,最好保留该复选框处于启用状态
- 您不需要将
onclick
添加到所有复选框中-它效率不高,维护困难,并且会为每个这样的声明生成幕后匿名函数;您可以将事件附加到所有复选框的父项,只需选中事件的目标以过滤掉所有不相关的元素
以下是我为您提供的解决方案:
HTML
<form id="myForm">
<table>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '80'>Q- 80. Statute of Liberty is in ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '153'>Q- 153. Indias Republic day is celebrated on ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '65'>Q- 65. Popular Language is ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '150'>Q- 150. Girnar is located at ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '154'>Q- 154. Largest Waterfall ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '152'>Q- 152. Asia is an ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '139'>Q- 139. Diamond is made up of ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '123'>Q- 123. Largest Desert ? </td> </tr>
</table>
</form>
例如:
在IE8+、FF、Safari、Chrome(在Mac和Windows上)上进行测试。如果您坚持使用javascript而不是jQuery,因为这在jQuery中可能非常简单,请检查此处:
功能验证(thisobj){
if(thisobj.checked==true){
对于(i=0;如果你使用jquery或一些javascript框架,这会容易得多。@Terror.Blade:不是那样工作的…..希望你的HTML中有myform
,我确实有…不完全相关,但给所有复选框起相同的名字没有意义,而是给单选按钮一个位置?你能从第二个if条件中导出吗?i刚刚选中“已单击复选框已选中”状态,如果选中,则禁用所有其他复选框;如果未选中,则启用所有复选框。如果未选中复选框,则首先检查“如果”条件……这将禁用所有复选框
<form id="myForm">
<table>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '80'>Q- 80. Statute of Liberty is in ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '153'>Q- 153. Indias Republic day is celebrated on ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '65'>Q- 65. Popular Language is ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '150'>Q- 150. Girnar is located at ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '154'>Q- 154. Largest Waterfall ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '152'>Q- 152. Asia is an ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '139'>Q- 139. Diamond is made up of ? </td> </tr>
<tr> <td colspan='3'> <input type='checkbox' name='check1' value = '123'>Q- 123. Largest Desert ? </td> </tr>
</table>
</form>
function listen(element, event, callback) {
if(element.attachEvent) { // IE
element.attachEvent('on'+event, callback);
} else { // W3C
element.addEventListener(event, callback);
}
}
var form = document.querySelector('#myForm');
listen(form, 'click', function(event){
var checkBoxes, i, checked, target;
target = event.srcElement || event.target; // IE or W3C
if(target.getAttribute('name') === 'check1') {
checkBoxes = form.querySelectorAll('input[name="check1"]');
checked = target.checked;
for(i=0;i<checkBoxes.length;i++) {
checkBoxes[i].disabled = checked && checkBoxes[i] !== target;
}
if(checked) {
// Validate and do something with result (target.value)
} else {
// Reset validation and result
}
}
});
$(function() {
$('#myForm').on('click', 'input[name="check1"]', function(event) {
$('#myForm input[name="check1"]').prop('disabled', event.target.checked);
event.target.disabled = false;
if(event.target.checked) {
// Validate and do something with result (event.target.value)
} else {
// Reset validation and result
}
});
});
function validate(thisobj){
if(thisobj.checked==true){
for (i=0; i<document.myForm.check1.length; i++){
if (document.myForm.check1[i].checked !=true){
document.myForm.check1[i].disabled='true';
}
}
} else {
for (i=0; i<document.myForm.check1.length; i++){
document.myForm.check1[i].disabled='';
}
}
}