//	otevre nove okno a natahne do neho danou stranku
function makeWindow(url) {
	window.open(url, '', "toolbar=no,status=no,scrollbars=no,resizable=yes,width=400,height=500");
}

//	kontrola spravnosti e-mailu
function checkEmail(email) {
	
	reg = new RegExp('^([a-zA-Z0-9\\-\\.\\_]+)'+'(\\@)([a-zA-Z0-9\\-\\.]+)'+'(\\.)([a-zA-Z]{2,4})$');
	result = (reg.test(email));
	
	return(result);
}

//	prompt pro zadani e-mailove adresy + kontrola
function getEmail(form) {
			
	var strEmail = prompt("Napiš e-mail adresu, na kterou chceš poslat tento článek:", "@");
	
	if(checkEmail(strEmail)) {
		form.email.value = strEmail;
		return true;
	}
	else {
		alert("'" + strEmail + "' není platnou e-mailovou adresou...");
		return false;
	}
}

//	
function warnAlert(text) {
	
	alert(text);
}