// JavaScript Document
function trim(s) {
	return s.replace(/^\s*|\s*$/g, '');
}


// 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 trims(s)
{   var i;
    var returnString = "";
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (c != " ") returnString += c;
    }
    return returnString;
}
function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
	for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone) {
	var bracket=3;
	strPhone=trims(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 && s.length <= 13));
}
/*
function ValidateForm(){
	var Phone=document.frmSample.txtPhone
	
	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 chkEmail(val) {
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	if (filter.test(val)) {
		return true;
	}
	else {
		return false;
	}		
}

function checkFields() {
	var mesg = "";	
	if (trim(document.frmRight.Name.value) == "") {
		mesg += "Name\n";
	}
	if (chkEmail(document.frmRight.Email.value) == false) {
		mesg += "Email\n";
	}	
	if (trim(document.frmRight.Phone.value) == "") {
		mesg += "Phone\n";
	}
	else {
		if (checkInternationalPhone(document.frmRight.Phone.value)==false){	
			mesg += "Invalid Phone format. Please enter valid phone number\n";
		}		
	}
	if (mesg != "") {
		mesg = "Please enter/correct the following fields\n\n"	+ mesg;
		alert(mesg);
		return false;
	}
	
}