function verify_checkbox(name, count, message) {
	checked = false;
	for(var i=0;i<count;i++) {
		if(document.getElementById(name+'['+i+']').checked) {
			checked = true;
			break;
		}
	}
	if(!checked) {
		alert(message);
		document.getElementById(name+'[0]').focus();
	}
	return checked;
}