var key,color,text,nameday,weeknumber;

function getCode() {
	var pattern = /^([0-9a-z-]+\.){1,5}[a-z]{2,4}$/i;

	var address = gId('address').value.toLowerCase();
	address = address.replace('http://', '');
	if (address.substring(0, 4) == 'www.')
		address = address.substring(4);
	address = address.split('/');
	var server = address[0];
	
	if (server == '' || pattern.test(server) == false) {
		alert('Neplatná adresa, zkontrolujte zadanou adresu stránek.');
		return false;
	}
	
	color = gId('color').value;
	text = gId('text').value;
	nameday = gId('nameday').checked ? 1 : 0;
	weeknumber = gId('weeknumber').checked ? 1 : 0;
	
	var A = new Ajax('../retrieve_key.php', 'url='+server);
	A.onSuccess = function() {
		eval(A.response);
		var code = '<a href="http://www.naplanuj-to.cz" id="kalendarNT" style="text-decoration:none" title="Kalendář">Kalendar</a>\n<script src="http://www.naplanuj-to.cz/zdarma-na-web/kalendar/kalendar.js.php?key='+key+'&amp;nameday='+nameday+'&amp;week='+weeknumber+'&amp;color='+color+'&amp;text='+text+'" charset="utf-8"></script>';
		gId('code').value = code;
	}
	A.start();
}

function change_bg() {
	var img = gId('ex');
	var color = gId('color').value;
	img.style.background = 'url("bg-'+color+'.png")';
}

function show_el(checkbox,id) {
	gId(id).style.display = checkbox.checked ? '' : 'none';
}