Alright I just took a crack at it. I haven't tested it, so there could be a bug in it. I wasn't aware of the mail() method in javascript, but I guess it is just a custom function? Anyways, I think this is what you're looking for.

function whatever() {



for(x = 0; x < document.name_of_form.elements.length; x++) {

	if (document.name_of_form.elements[x].type == 'checkbox') {

		if (document.name_of_form.elements[x].value == 1) {

			mail(document.name_of_form.elements[x].name);

		}

	}

}