// pouzivano misto (v norme Strict) zakazaneho target='_blank'
function external(url) {
	win = window.open(url);
	return (typeof(win)=='object') ? false : true;
}

// otevre nove okno - url se zjisti z parametru href
// pouzivano misto (v norme Strict) zakazaneho target='_blank'
function external_link(elem) {
	if (elem.getAttribute('href')) {
		return external(elem.getAttribute('href'));
	}
	
	return true;
}

function openCalculator(elem) {
	if (elem.getAttribute('href')) {
		window.open(elem.getAttribute('href'), 'calculator', 'width=324,height=415,menubar=no,resizable=yes');
		return false;
	}

	return true;
}