function wi(url, width, height)
{
	width += 50; height += 50;
	window.open(url, 'foto', 'width='+width+', height='+height+', toolbar=no, location=no, resizable=yes, scrollbars=yes, top=100, left=100');
	return false; 
}

function w(url)
{
    window.open(url, "page", "menubar=yes, location=yes, status=yes, toolbar=no, scrollbars=yes, resizable=yes");
    return false;
}

function oncell(nr)
{
	var el = document.getElementById('cell' + nr);
	el.className = 'oncell';
}

function outcell(nr)
{
	var el = document.getElementById('cell' + nr);
	el.className = 'outcell';
}

function change_pair()
{
	var el = document.getElementById('pair');
	el.value = 1;
	return true;
}


function trim(hodnota)
{
	if (hodnota.charAt(0) == " ") {
		hodnota = hodnota.substring(1,hodnota.length);
		hodnota = trim(hodnota);
	}
	if (hodnota.charAt(hodnota.length-1) == " ") {
		hodnota = hodnota.substring(0,hodnota.length-1);
		hodnota = trim(hodnota);
	}
	return hodnota;
}


function validate_message_form()
{
	var report = '';
	var error = false;
	var message = document.getElementById('message').value;
	message = trim(message);
	var mail = document.getElementById('mail').value;
	mail = trim(mail);
	if (mail.length) {
		if (mail.indexOf("@") < 1 || (mail.indexOf("@") + 2 > mail.lastIndexOf("."))
			|| (mail.length < mail.lastIndexOf(".") + 2) || mail.indexOf(" ") != -1) {
			report += 'E-mailová adresa neni zadána správně !\n';
			error = true;
		}
	} else {
		error = true;
		report += 'Nebyla zadána e-mailová adresa!\n';
	}
	if (!message.length) {
		error = true;
		report += 'Nebyl zadán žádný dotaz!';
	}
	if (error) {
		alert (report);
		return false;
	}
	return true;
}

function on_cellar()
{
	var el = document.getElementById('c-img-par');
	el.className = 'oncell';
}

function out_cellar()
{
	var el = document.getElementById('c-img-par');
	el.className = 'outcell';
}

var textarea_cleared = false;
function clear_textarea()
{
	if (!textarea_cleared) {
		var el = document.getElementById('message');
		el.value = '';
		textarea_cleared = true;
	}
}

var fulltext_area_cleared = false;
function clear_fulltext_area()
{
	if (!fulltext_area_cleared) {
		var el = document.getElementById('search');
		if (el.value == 'Hledej...') {
			el.value = '';
			fulltext_area_cleared = true;
		}
	}
}