Javascript关于树形菜单，Checkbox的全选

Javascript关于树形菜单，Checkbox的全选,标签：javascript视频教程,javascript教程下载,http://www.xuehuiba.com
                        }
                        // 子类
                        if (parentElement.pid > "0")
                        {
                                chk[0].checked = checked;
                                var parentObj;        // 父类对象
                                for (var i=0; i<count; i++)
                                {
                                        if (chk[i].parentElement.id == parentElement.pid)        // 选中父类
                                        {
                                                parentObj = chk[i];        // http://www.knowsky.com/tools/wangzhansuduceshi.asp 将父类对象赋于一个变量
                                                chk[i].checked = checked;
                                        }
                                        if (chk[i].parentElement.pid == parentElement.pid)        // 如果子类中有一项没有选中，将父类的选中取消
                                        {
                                                if (!chk[i].checked) parentObj.checked = false;
                                        }
                                        if (!chk[i].checked) chk[0].checked = false;
                                }

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