Javascript或Jquery检查并取消选中所有复选框 [英] Javascript or Jquery to check and uncheck all checkbox
问题描述
我有一个包含复选框列表的表单。我想创建一个checkAll和UncheckAll框以获得更好的用户体验。我尝试了很多从Internet获得的代码,但没有一个能够工作。你能帮我看看,告诉我是什么问题。谢谢
I have a form with a list of checkboxs. I want to create a checkAll and UncheckAll boxes for better user experience. I tried a lot of code that I got from Internet, but none of them worked. Can you help me to take a look and tell me what is the problem. thanks
<script type="text/javascript">
function checkAll(field)
{
for (i = 0; i < field.length; i++)
field[i].checked = true ;
}
function uncheckAll(field)
{
for (i = 0; i < field.length; i++)
field[i].checked = false ;
}
</script>
<style type="text/css">
#user_info {
border-collapse:collapse;
}
#user_info td, #user_info th {
width:100px;
border:1px solid #CACACA;
padding:5px;
}
#checkbox{
padding:20px 0 20px 250px;
}
</style>
<p>Please choose all the users whose group_id you want to replace with that of the uploaded file</p>
<form id="groupImportForm" action="<?php echo url_for('group_utilization/importGroupMarching') ?>" method="POST">
<table id="user_info">
<thead>
<th>User ID</th>
<th>Last Name</th>
<th>First Name</th>
<th>Date_Of_Birth</th>
<th>Old Group_ID</th>
<th>New Group_ID</th>
<th>Update GroupID</th>
</thead>
<tbody>
<?php foreach($userGroupData as $value): ?>
<tr>
<td><?php echo $value['user_id']; ?></td>
<td><?php echo $value['last_name']; ?></td>
<td><?php echo $value['first_name']; ?></td>
<td><?php echo $value['date_of_birth']; ?></td>
<td><?php echo $value['group_id_old']; ?></td>
<td><?php echo !empty($value['group_id_new']) ? $value['group_id_new'] : ''; ?></td>
<td><input type="checkbox" name="isReplaceGroupID[<?php echo $value['user_id']; ?>]" value="<?php echo $value['group_id_new']; ?>"></input></td>
</tr>
<?php endforeach; ?>
</tbody>
</table>
<div id="checkbox">
<input type="button" name="CheckAll" value="Check All"
onClick="checkAll(document.myform.list)">
<input type="button" name="UnCheckAll" value="Uncheck All"
onClick="uncheckAll(document.myform.list)">
</div>
<div><input type="submit" value="Continue" /></div>
</form>
<br/>
<br/>
推荐答案
我生活在jQuery上,所以我抓住了一些来自这里不使用jQuery更新您的代码:
http://www.coderanch .com / t / 120677 / HTML-CSS-JavaScript / find-Checkboxes
I live on jQuery, so I grabbed some code from here to update your code without using jQuery: http://www.coderanch.com/t/120677/HTML-CSS-JavaScript/find-Checkboxes
这是一个有效的解决方案:
http://jsfiddle.net/nvAtF/1/
Here's a working solution: http://jsfiddle.net/nvAtF/1/
这是与jQuery相同的解决方案:
http://jsfiddle.net/nvAtF/2/
Here's the same solution with jQuery: http://jsfiddle.net/nvAtF/2/
这是代码块:
function toggleCheckboxes(flag) {
var form = document.getElementById('groupImportForm');
var inputs = form.elements;
if(!inputs){
//console.log("no inputs found");
return;
}
if(!inputs.length){
//console.log("only one elements, forcing into an array");
inputs = new Array(inputs);
}
for (var i = 0; i < inputs.length; i++) {
//console.log("checking input");
if (inputs[i].type == "checkbox") {
inputs[i].checked = flag;
}
}
}
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