[jQuery] Select All Checkbox 選取所有選取框checkbox

Sample Below: (save to html to try this)

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>

<script type="text/javascript">
$(function() {
/**
 * Select all checkbox
 */
  flag = false;
  $(".selectall").click(function() {
    flag = !flag;
    $("input[name='box[]']").each(function() {
      $(this).attr("checked" , flag);
    });
    $(".selectall").attr("checked", flag);
  });
});
    

</script>

<input type="checkbox" class="selectall"> Select All<br />
<input type="checkbox" name="box[]"><br />
<input type="checkbox" name="box[]"><br />
<input type="checkbox" name="box[]"><br />
<input type="checkbox" name="box[]"><br />
<input type="checkbox" name="box[]"><br />
<input type="checkbox" name="box[]"><br />
<input type="checkbox" name="box[]"><br />
<input type="checkbox" name="box[]"><br />