How to limit the number of selected checkboxes?

A

alexchenco

Guest
I have the following HTML:

<div class="pricing-levels-3">
<p><strong>Which level would you like? (Select 3 Levels)</strong></p>
<input class="single-checkbox"type="checkbox" name="vehicle" value="Bike">Level 1<br>
<input class="single-checkbox" type="checkbox" name="vehicle" value="Bike">Level 2<br>
<input class="single-checkbox" type="checkbox" name="vehicle" value="Bike">Level 3<br>
<input class="single-checkbox" type="checkbox" name="vehicle" value="Bike">Level 4<br>
<input class="single-checkbox" type="checkbox" name="vehicle" value="Bike">Level 5<br>
<input class="single-checkbox" type="checkbox" name="vehicle" value="Bike">Level 6<br>
<input class="single-checkbox" type="checkbox" name="vehicle" value="Bike">Level 7<br>
</div>


Live site:

http://www.chineselearnonline.com/amember/signup20.php

How can I do it so that the user can only select 3 of those checkboxes?

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