$(document).ready(function(){

	 $("input,textarea").focus(function () {
         $(this).css('background-color','#d0ffbf');
    });

	$("input,textarea").blur(function () {
         $(this).css('background-color','white');
    });
	
});

// 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 trim(s)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not a whitespace, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (c != " ") returnString += c;
    }
    return returnString;
}
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){
	var bracket=3
	strPhone=trim(strPhone)
	if(strPhone.indexOf("+")>1) return false
	if(strPhone.indexOf("-")!=-1)bracket=bracket+1
	if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket)return false
	var brchr=strPhone.indexOf("(")
	if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")")return false
	if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false
	s=stripCharsInBag(strPhone,validWorldPhoneChars);
	return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

function validateForm() {

	if(document.reservation.firstname.value == "") {
		alert("You must enter your first name.");
		document.reservation.firstname.focus();
		document.reservation.firstname.style.backgroundColor = "pink";
		return false;
	}	

	if(document.reservation.lastname.value == "") {
		alert("You must enter your last name.");
		document.reservation.lastname.focus();
		document.reservation.lastname.style.backgroundColor = "pink";
		return false;
	}

	var pattern=/^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+/;
	if(!pattern.test(document.reservation.email.value)) {
		alert("You must enter a vaild email address.");
		document.reservation.email.focus();
		document.reservation.email.style.backgroundColor = "pink";
		return false;
	}

	if ((document.reservation.phone.value==null)||(document.reservation.phone.value=="")){
		alert("Please enter your phone number.");
		document.reservation.phone.focus();
		document.reservation.phone.style.backgroundColor = "pink";
		return false;
	}
	if (checkInternationalPhone(document.reservation.phone.value)==false){
		alert("Please enter a valid phone number.")
		document.reservation.phone.value="";
		document.reservation.phone.focus();
		document.reservation.phone.style.backgroundColor = "pink";
		return false;
	}
	if (document.reservation.understand.checked == false){
		alert("You must read the list and check the 'I Understand' box before continuing.");
		document.reservation.understand.focus();
		return false;
	}
	return true;
 }
 
 function togglePets(cb) {
	if(cb.checked == true) {
		document.reservation.pets[0].checked = true;
	}
	if(document.reservation.dogs.checked == false && document.reservation.cats.checked == false && document.reservation.other.value == "") {
		document.reservation.pets[1].checked = true;
	}
 }
 
 function otherCheck(other) {
	if(other.value != "") {
		document.reservation.pets[0].checked = true;
 	}
 	if(other.value == "" && document.reservation.dogs.checked == false && document.reservation.cats.checked == false) {
 		document.reservation.pets[1].checked = true;
 	}
 }
 
 function clearPets() {
 	document.reservation.dogs.checked = false;
 	document.reservation.cats.checked = false;
 	document.reservation.pets_other.value = "";
 }