Question

Is there a way to check a form before submitting it to see if ANY of the checkboxes have been checked in Javascript?

Something like…

function checkboxcheck(){
/*something in here to check name="brands[]" checkbox array?*/
}

Basically I just want it to alert me if 0 checkboxes were selected. 1 or more is required.

I would call this function on submit.

Thanks much!!

Answer 1

How about:

function checkboxcheck(name) {
    var els = document.getElementsByName(name);

    for (var i = 0; i < els.length; i++) {
        if (els[i].checked) {
            return true;
        }
    }
    return false;
}

using getElementsByName().

Usage:

var valid = checkboxcheck("brands[]");

Here’s an example: http://jsfiddle.net/andrewwhitaker/2saJp/1/