$(document).ready(function(){
	function isValidEmail(strEmail) {
		validRegExp = /^([A-Za-z0-9-_]+(\.?[_A-Za-z0-9-]+)*){1,}@([A-Za-z0-9-_]+(\.[A-Za-z0-9-_]+)*){1,}(\.[A-Za-z]{2,3})$/i;
		if (strEmail.search(validRegExp) == -1) {
			return false;
		}
		return true;
	}

	$("#btnMailReg").click(function(){
		var error = false;
		message = "";

		if(!isValidEmail($("#regNewMail").val())){
			error = true;
			message += "E-mail není ve správném formátu.\n"
		}

		if(error == true){
			alert(message);
			return false;
		}

		else{
			$("#formMailReg").submit();
		}
	});
});