function validateFields(){
missinginfo = "";
if (document.rezervari_form.Name.value == "") {
missinginfo += "\n     -  Nume";
}

if (document.rezervari_form.date8a.value == "") {
missinginfo += "\n     -  Sosire";
}
if (document.rezervari_form.date8b.value == "") {
missinginfo += "\n     -  Plecare";
}

if (document.rezervari_form.Email.value == "") {
missinginfo += "\n     -  Email";
} else {
	str = document.rezervari_form.Email.value;
	if ((str.indexOf(".") <= 2) || (str.indexOf("@") <= 0)) {
		missinginfo += "\n     -  Email contine: @,.";
	}
}
if (document.rezervari_form.Telefon.value == "") {
missinginfo += "\n     -  Telefon";
} else {
	phone = document.rezervari_form.Telefon.value;
	if (checkInternationalPhone(phone) == false){
		missinginfo += "\n     -  Telefon invalid";
	}
}
if (document.rezervari_form.Message.value == "") {
missinginfo += "\n     -  Mesaj";
} 
if (missinginfo != "") {
missinginfo ="Introduceti date valide pentru: " + missinginfo;
alert(missinginfo);
return false;
}
else return true;
}

// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}