限制涉及数组时检查的框数

Question

I'm pretty amateurish when it comes to JavaScript stuff, so I apologize if this question comes off as a bit dumb.

I'm currently trying to code something that involves forms with a limit on how many checkboxes can be selected. The method I've come across that has worked best for my purposes so far is the one detailed here:

http://www.javascriptkit.com/script/script2/checkboxlimit.shtml

It works for the most part but I run into an issue when checkboxes need to output an array. For example, if I write the input line as:

<input type="checkbox" name="choice[]" value="One" /> One<br />
<input type="checkbox" name="choice[]" value="Two" /> Two<br />
<input type="checkbox" name="choice[]" value="Three" /> Three<br />

I've tried quite a few things but I can't figure out how to change the code so that it works with the brackets in the input's name field.

Answer 1

Using that script above, you can change it into using .elements to get the group of elements and applying that same custom function:

<script type="text/javascript">

// Syntax: checkboxlimit(checkbox_reference, limit)

var world_form = document.forms.choices; // the form
var my_checkboxes = world_form.elements['choice[]']; // check boxes
checkboxlimit(my_checkboxes, 2);

</script>

Fiddle