javascript - checkbox validation

[kabatak]

Hi, how do you validate that atleast 1 checkbox must be checked in an array of checkboxes? Example:

<form>
<input type="checkbox" name="checkbox[]">
<input type="checkbox" name="checkbox[]">
<input type="checkbox" name="checkbox[]">
<input type="submit">
</form>

The form must not submit if no checkbox was checked and it should only submit if atleast 1 checkbox is checked.

 

[ashben]

http://www.faqts.com/knowledge_base/view.phtml/aid/10200/fid/310

 

[kabatak]

thanks