相关疑难解决方法(0)

我有这个代码:

<script>
function toggle(source) {

  checkboxes = document.getElementsByName('DG1');
  for each(var checkbox in checkboxes)
    checkbox.checked = source.checked;

  checkboxes = document.getElementsByName('DG2');
  for each(var checkbox in checkboxes)
    checkbox.checked = source.checked;

  checkboxes = document.getElementsByName('DG3');
  for each(var checkbox in checkboxes)
    checkbox.checked = source.checked;

  checkboxes = document.getElementsByName('DG4');
  for each(var checkbox in checkboxes)
    checkbox.checked = source.checked;

  checkboxes = document.getElementsByName('DG5');
  for each(var checkbox in checkboxes)
    checkbox.checked = source.checked;
}
</script>

<input type="checkbox" onClick="toggle(this)" />Select All<br/>

<form method=POST action="DGUsageServlet">
    <input type="checkbox" name="DG1">DG1</input>
    <input type="checkbox" name="DG2">DG2</input>
    <input type="checkbox" name="DG3">DG3</input>
    <input …