检查复选框是否检查，然后选中另一个复选框

我有一个网页上有6个复选框。

I have a web page which has 6 checkboxes on it.

<input type="checkbox" name="chk1" id="chk1" class="chkbox"/>
<input type="checkbox" name="chk2" id="chk2" class="chkbox"/>
<input type="checkbox" name="chk3" id="chk3" class="chkbox"/>
<input type="checkbox" name="chk4" id="chk4" class="chkbox"/>
<input type="checkbox" name="chk5" id="chk5" class="chkbox"/>
<input type="checkbox" name="chk6" id="chk6" class="chkbox"/>

使用jquery如何检查所有这6个复选框是否被选中，如果所有6复选框7：

Using jquery how can I check to see if all of these 6 checkboxes are checked and if all 6 are checked check checkbox number 7:

<input type="checkbox" name="chk7" id="chk7" class="chkbox"/>

我已经开始写函数，但不确定这是否是最好的方法： / p>

I have started to write the function but not sure if this is the best way to do this:

    function AllSectionsChecked {
        var isChecked1 = $('##chk1').attr('checked')?true:false;
        var isChecked2 = $('##chk2').attr('checked')?true:false;
        var isChecked3 = $('##chk3').attr('checked')?true:false;
        var isChecked4 = $('##chk4').attr('checked')?true:false;
        var isChecked5 = $('##chk5').attr('checked')?true:false;    
        var isChecked6 = $('##chk6').attr('checked')?true:false;                    
    }

任何帮助将不胜感激。

Any help would be appreciated. I am guessing its pretty much straight forward but just looking for the best way to accomplish this in jquery.

更新：
* ID和名称是动态创建的，可能不是任何顺序或规模，所以一个id可能chk51和下一个也许chk205，Appologies我应该把这个在我原来的帖子*
Thankyou您的建议到目前为止。

UPDATE: *The ids and names are created dynaically and may not be in any order or scale so an id maybe chk51 and the next one maybe chk205, Appologies I should have put this in my original post * Thankyou for your suggestions so far.

非常感谢。