JQuery Select All Chekboxes Using Label For

I am using a jquery plugin called magic-check, to create styled checkboxes. The checkboxes are displayed using the following example code:

<input type="checkbox" class="magic-checkbox" value="4140" id="4140" name="chc">
<label for="4140"></label>

I am having issues creating a select all button. I think the css on magic-check hides the checkbox and styles the label. I have tried numerous methods to solve, but no luck.