function popup(bestand,naam) {
msg = open("","Popup"+naam,"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=yes,width=400,height=400"); msg.location = bestand
}
function count_checkbox(name_check) {
	var total = 0;
	var max = document.getElementsByName(name_check+"[]").length;
	for (var idx = 0; idx < max; idx++) {
		if (document.getElementsByName(name_check+"[]")[idx].checked == true) {
		    total += 1;
		}
	}
	return total;
}
function select_checkbox(name_check) {
	var max = document.getElementsByName(name_check+"[]").length;
	for (var idx = 0; idx < max; idx++) {
		document.getElementsByName(name_check+"[]")[idx].checked = true;
	}
	return ;
}
function deselect_checkbox(name_check) {
	var max = document.getElementsByName(name_check+"[]").length;
	for (var idx = 0; idx < max; idx++) {
		document.getElementsByName(name_check+"[]")[idx].checked = false;
	}
	return ;
}