// 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);
}

function ValidateForm(){
	var Phone=document.referralForm.phone
	
	if ((Phone.value==null)||(Phone.value=="")){
		alert("Please Enter your Phone Number")
		Phone.focus()
		return false
	}

	if (checkInternationalPhone(Phone.value)==false){
		alert("Please Enter a Valid Phone Number")
		Phone.value=""
		Phone.focus()
		return false
	}
	return true
 }
 
 function ValidateForm2(){
	var Phone1=document.referral.phone1
	var Phone2=document.referral.phone2
	var Phone3=document.referral.phone3
	var Phone4=document.referral.phone4

	

	if ((Phone1.value==null)||(Phone1.value=="")){
		alert("Please Enter your Phone Number")
		Phone1.focus()
		return false
	}
		if (checkInternationalPhone(Phone1.value)==false){
		alert("Please Enter a Valid Phone Number")
		Phone1.value=""
		Phone1.focus()
		return false
	}
		if ((Phone1.value==null)||(Phone2.value=="")){
		alert("Please Enter your Phone Number")
		Phone2.focus()
		return false
	}
		if (checkInternationalPhone(Phone2.value)==false){
		alert("Please Enter a Valid Phone Number")
		Phone2.value=""
		Phone2.focus()
		return false
	}
		if ((Phone1.value==null)||(Phone3.value=="")){
		alert("Please Enter your Phone Number")
		Phone3.focus()
		return false
	}
		if (checkInternationalPhone(Phone3.value)==false){
		alert("Please Enter a Valid Phone Number")
		Phone3.value=""
		Phone3.focus()
		return false
	}
		if ((Phone1.value==null)||(Phone4.value=="")){
		alert("Please Enter your Phone Number")
		Phone4.focus()
		return false
	}
		if (checkInternationalPhone(Phone4.value)==false){
		alert("Please Enter a Valid Phone Number")
		Phone4.value=""
		Phone4.focus()
		return false
	}

	return true
 }