function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false}
else {return true}
}
}

function check_cars(test){
error_msg="";
if ((test.carList.options[test.carList.selectedIndex].text)=="Select Your Car")
error_msg="Select your car";

if (error_msg=="")
return true;
else{
alert(error_msg);
return false;
}
}

function validate_email(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@")
dotpos=value.lastIndexOf(".")
if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false}
else {return true}
}
}
/* International Phone Validator */
// 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 = 8;

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 validate(thisform)
{
with (thisform)
{
	if (validate_required(carList,"Select your car!")==false)
  {carList.focus();return false}
  if (validate_required(service,"Select your service!")==false)
  {service.focus();return false}
if (validate_required(firstname,"Please Enter Your First Name!")==false)
  {firstname.focus();return false}
  else if (validate_required(lastname,"Please Enter Your Last Name!")==false)
  {lastname.focus();return false}
  else if (validate_required(email,"Please Enter Your Email!")==false)
  {email.focus();return false}
  else if (validate_email(email,"Invalid Email Address!")==false)
  {email.focus();return false}
   else if (validate_required(cell_phone_number,"Please Enter Your Mobile Number !")==false)
  {cell_phone_number.focus();return false}
  else if (checkInternationalPhone(cell_phone_number.value)==false){
		alert("Please Enter a Valid Mobile Number !")
		cell_phone_number.value=""
		cell_phone_number.focus()
		return false}
		
 
 
 
 else if (validate_required(registration_no,"Please Enter Registration Number")==false)
  {registration_no.focus();return false}
  
 
 
 
  
 }
}