点击按钮全选,所有复选框选中,再次点击,全部取消选中js

先画一个复选框组check1(0)，check1(1)，check1(2)，
画几个根据情况定:
Private Sub Command1_Click()
Dim i As Integer
For i = 0 To 2
Check1(i)Value = 1
Next i
End Sub
Private Sub Command2_Click()
Dim i As Integer
For i = 0 To 2
Check1(i)Value = 0
Next i
End Sub

<input type="checkbox" name="checkAll" class="selectAll" onclick="chkChange();" />   

<input type="checkbox" class="cb_box " name="chdel"/>

//全选||全不选

      function chkChange() {

          if ($("selectAll")attr("checked")) {

              $("cb_box")each(function () {

                  $(this)attr("checked", true);

              });

          } else {

              $("cb_box")each(function () {

                  $(this)attr("checked", false);

              });

          }

      }

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