// KONTAKTNI FORMULAR zacatek

function tma(x)
{
	if (x==1) {
		document.getElementById("zatemneno").style.display = "block";
		document.getElementById("zatemneno").style.visibility = "visible";
		document.getElementById("infookno").style.display = "block";
		document.getElementById("infookno").style.visibility = "visible";
		document.getElementById("formular_jmeno").focus();

	}
	else
	{
		document.getElementById("infookno").style.display = "none";
		document.getElementById("infookno").style.visibility = "hidden";
		document.getElementById("zatemneno").style.display = "none";
		document.getElementById("zatemneno").style.visibility = "hidden";
	}
}

function validate_email(field,alerttxt)
{
	// nekompletní, funguje "abc@def."
	with (field)
	{
		apos=value.indexOf("@")
		dotpos=value.lastIndexOf(".")
		if (apos<1||dotpos-apos<2) 
		  	{alert(alerttxt);return false}
		else {return true}
	}
}

function checkForm()
{
	if (document.forms['kontakt'].jmeno.value == '') {
		alert('Je nutno vyplnit jméno.');
		return false;
	} else if (document.forms['kontakt'].email.value == '') {
		alert('Je nutno vyplnit e-mailovou adresu.');
		return false;
	} else if ( !validate_email(document.forms['kontakt'].email, "Neplatná e-mailová adresa!") ) {
		return false;
	} else if (document.forms['kontakt'].dotaz.value == '') {
		alert('Je nutno vyplnit dotaz.');
		return false;
	} else if (document.forms['kontakt'].dotaz.value.length > 5000) {
		alert('Dotaz je moc dlouhý (povoleno max. 5\'000 znaků).');
		return false;
	}

	return true;
}

// KONTAKTNI FORM. konec


// COOKIES

function setCookie(c_name,value,expiredays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate()+expiredays);
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
window.location.reload(true);
}