function validate_napiste(frm) {
	if(frm.elements['jmeno'].value == '') {
		alert('Je nutno vyplnit pole JMENO');
		return false;
	}
	if(frm.elements['email'].value == '') {
		alert('Je nutno vyplnit pole EMAIL');
		return false;
	}
	regex = /^((\"[^\"\f\n\r\t\v\b]+\")|([\w\!\#\$\%\&'\*\+\-\~\/\^\`\|\{\}]+(\.[\w\!\#\$\%\&'\*\+\-\~\/\^\`\|\{\}]+)*))@((\[(((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9])))\])|(((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9])))|((([A-Za-z0-9\-])+\.)+[A-Za-z\-]+))$/;
	if(!regex.test(frm.elements['email'].value)) {
		alert('Chybně zadaný EMAIL');
		return false;
	}
	return true;
}

function otevri_okno(url, width, height) {
	window.open("foto.php?img="+url,"foto","width="+width+",height="+height+",status=1,statusbar=1,toolbar=0,menubar=0,location=0,directories=0,resizable=1,scrollbars=0");
	return false;
}