Checkboxes; Simple Problem

Hi, thanks for all you who helped me thus far!

Anyways, I know I can search for a solution for my problem on tutorial sites but I dunno what to look up. I look up checkboxes but I just get information on how to set up the tag which I know.

The problem is I want to determine how many checks a user has made in a given amount of checkboxes. How would I go to accomplish this?

Thanks again

something like:

<script type="text/javascript">

function countchecks() {

var el = document.forms[0].elements;
var count = 0;

for (var i = 0; i < el.length; i++) {

if (el.type == 'checkbox' && el.checked) count++;

}

alert(count);

}
</script>

My form will contain more then just checkboxes; it will contain text, radio, etc...so how and where do I call the function above?

Also How would I combine that with PHP? For example, store the var count in a php $var? Or is there a better way?

Thanks.

ok, maybe I should have asked what you intend to do with the count in the first place. Do you need it in PHP? For what purpose? With that info I may be able to give you a better answer.

There is no other way to return something from javascript to PHP than including it in a form or adding it to the url and do a postback to the server; clientside and serverside are two total different environments only connected through HTTP requests back and forth.

yea I do need it in php, because I am requred to insert into a mySQL table afterwards.

So is it still possible to retrieve the amounts of checks a user makes, in php of course?

cheers

If you have a way to distinguish the checkboxes from the other inputs (either by name or by value) you can just walk through the $_POST array and count how many items you can find (checkboxes that are not checked are not being sent with the form).

you can make a checkbox part of an array by using this tag



when returning you can cycle through the array and check for values



Hope that makes sense. I think theres a limit of 128 checkboxes (I think)