function potvrdit(hlaska) {
	var ret = confirm(hlaska);
	if (ret)
		return true;
	else
		return false;
}

function reset_formu(f) {
	for (var i = 0; i < f.elements.length; i++) {
		el = f.elements[i];
		if (el && el.tagName != null) {
			if (el.tagName == 'INPUT') {
				switch (el.type) {
					case 'checkbox':
					case 'radio':
						el.indeterminate = false;
						el.checked = el.status = el.defaultChecked;
					break;
					case 'text':
					case 'file':
						el.value = '';
					break;
				}
			} else if (el.tagName == 'SELECT') {
				el.selectedIndex = 0;
			}
		}
	}
	return false;
}

function platbaSK(el, m, e1, e2) {
	var el1 = document.getElementById('platba' + e1);
	var el11 = document.getElementById('platbaR' + e1);
	var el2 = document.getElementById('platba' + e2);
	var el22 = document.getElementById('platbaR' + e2);

	if (!el1 || !el2)
		return;

	if (m) {
		el1.style.display = '';
		el2.style.display = 'none';
		el11.checked = true;
		el22.checked = false;
	} else {
		el1.style.display = '';
		el2.style.display = '';
		el11.checked = false;
		el22.checked = false;
	}
	el.checked = true;
}