//javascript document

//functions added by jordy 25-Feb-07
function inverse($o) {
	for ($i=0; $i < $o.elements.length; $i++) {
		if ($o.elements[$i].type == "checkbox" && $o.elements[$i].name != "collection"
			&& $o.elements[$i].parentNode.parentNode.style.display!='none') {
			$o.elements[$i].checked = !$o.elements[$i].checked;
		}
	}
}

function check($f){
	$checked = 0;
	for ($i=0; $i < $f.elements.length; $i++) {
		if ($f.elements[$i].type == "checkbox" && $f.elements[$i].checked && $f.elements[$i].name != "collection"){ 
			$checked++;
		}
	}
	
	if ($checked == 0){
		alert('Select at least one file.');
		return false;
	}
	return true;
}