// JavaScript Document
// 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 echeck(str) {
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
	   alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		alert("Invalid E-mail ID")
		return false
	}

	 if (str.indexOf(at,(lat+1))!=-1){
		alert("Invalid E-mail ID")
		return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		alert("Invalid E-mail ID")
		return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
		alert("Invalid E-mail ID")
		return false
	 }
	
	 if (str.indexOf(" ")!=-1){
		alert("Invalid E-mail ID")
		return false
	 }

	 return true					
}

function postalcheck()
{
	var Street = document.getElementById("txtStreet");
	var city = document.getElementById("txtcity");
	var State = document.getElementById("cmbState");
	var postcode = document.getElementById("txtzip");

	if((Street.value==null) || (Street.value=="")) {
		alert("Please Enter Your street address")
		Street.focus()
		return false
	}

	if((city.value==null) || (city.value=="")) {
		alert("Please Enter Your city.")
		city.focus()
		return false
	}

	if((State.value==null) || (State.value=="")) {
		alert("Please Select State.")
		State.focus()
		return false
	}

	if((postcode.value==null) || (postcode.value=="")) {
		alert("Please Enter Your Zip code")
		postcode.focus()
		return false
	}
}

function phonecheck()
{
	var phoneNum = document.getElementById("txtphoneNum");	
	if ((phoneNum.value==null)||(phoneNum.value=="")){
		alert("Please Enter your Phone Number")
		phoneNum.focus()
		return false
	}
	if (checkInternationalPhone(phoneNum.value)==false){
		alert("Please Enter a Valid Phone Number")
		phoneNum.value=""
		phoneNum.focus()
		return false
	}
}

function emailcheck()
{
	var emailTex=document.getElementById("txtemailTex");
	if ((emailTex.value==null)||(emailTex.value=="")){
		alert("Please Enter Your Email ID")
		emailTex.focus()
		return false
	}

	if (echeck(emailTex.value)==false){
		emailTex.value=""
		emailTex.focus()
		return false
	}
}

function faxcheck()
{
	var Fax = document.getElementById("txtfax");
	if ((Fax.value==null)||(Fax.value=="")){
		alert("Please Enter your Fax Number")
		Fax.focus()
		return false
	}
	if (checkInternationalPhone(Fax.value)==false){
		alert("Please Enter a Valid Fax Number")
		Fax.value=""
		Fax.focus()
		return false
	}
}

function validationFormOk(){
	var name = document.getElementById("txtName");

	var chkEmail=document.getElementById("chkEmail");

	var postalmail = document.getElementById("chkpostalmail");

	var Phone1 = document.getElementById("chkPhone1");

	var chkFax = document.getElementById("chkFax");

	var note = document.getElementById("txtnote");

	if((name.value==null) || (name.value=="")) {
		alert("Please Enter Your Name")
		name.focus()
		return false
	}

	if(postalmail.checked==false && Phone1.checked==false && chkFax.checked==false && chkEmail.checked==false) {
		alert('Please Select at least one contact preference.');
		return false;
	} else {
		if(postalmail.checked==true) {
			if(postalcheck()==false) {
				return false;
			}
		}
		if(Phone1.checked==true) {
			if(phonecheck()==false) {
				return false;
			}
		}
		if(chkFax.checked==true) {
			if(faxcheck()==false) {
				return false;
			}
		}
		if(chkEmail.checked==true) {
			if(emailcheck()==false) {
				return false;
			}
		}
	}

	if((note.value==null) || (note.value=="")) {
		alert("Please Enter Your Legal Issue.")
		note.focus()
		return false
	}

	return true
}